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April 24, 2014

Search: What is the magnitude of the force a +12 µC charge exerts on a +2.9 mC charge 43 cm away?

Number of results: 6,757

Physics
Posted by Adam on Thursday, August 13, 2009 at 11:08am. In the figure take q1 = 22uC and q2 = 20u. The force on q_1 points in the - x direction, What is the magnitude of the force on q_1? I dont know where to start, can someone help me? Responses Physics - bobpursley, Thursday...
Friday, August 14, 2009 at 3:08pm by Adam R

science 6th grade
I am suppose to explain how the moment magnitude and Richter scales of earthquake measurement are similar and how they are different. Can you tell me if I am correct? They are alike because they always come up with the same rating for an earthquake. They are different because ...
Friday, February 11, 2011 at 11:25pm by Reed

Physics
An upward force of 35 N is applied via a string to lift a ball with a mass of 2.1 kg. (a) What is the net force acting upon the ball? magnitude 1 N direction 2 ---Select--- upward downward (b) What is the acceleration of the ball? magnitude 3 m/s2 direction 4 ---Select--- ...
Monday, February 20, 2012 at 10:24pm by Mina

Physics
A baseball player is approaching home plate with a speed of 5.8m/s when he decides to slide. He slides for 1.1s, just reaching the plate safe. What is the magnitude and direction of the player's acceleration? How far did he slide? His magnitude of acceleration is 5.8/1.1= 5.3 ...
Saturday, September 11, 2010 at 8:11pm by Jamie

science
A man stands on the roof of a building of height 15.8m and throws a rock with a velocity of magnitude 25.2m/s at an angle of 32.7∘ above the horizontal. You can ignore air resistance. Part A Calculate the maximum height above the roof reached by the rock. y = 9....
Sunday, March 2, 2014 at 5:20am by sanele

physics (cross product vectors)
Two vectors are lying in the xz plane: A=2.00i + 3.00k and B= -9.00i + 2.00k. a) What is the value of AxB? Check my solution: I found through calculations that the value is 23j. b) What is the magnitude |AxB|? I could do ABsin theta, but I have no angle between. So am confused...
Tuesday, January 23, 2007 at 11:30am by steve

Physics (SO CONFUSED!!!)
I think I'm using the wrong formulas or SOMETHING... Here's the question: "Two equal charges are separated by 3.7 10^-10 m. The force between the charges has a magnitude of 2.37 10^-3 N. What is the magnitude of q on the charges?" Here's my work: F = kc(q1q2/r^2) 2.37 x 10...
Thursday, May 7, 2009 at 3:16am by Judy

physics
Matt forgot to put the fabric softener in the wash. As his socks tumbled in the dryer, they became charged. If a small piece of lint with a charge of +1.25 E -19 C is attracted to the socks by a force of 3.0 E -9 N, what is the magnitude of the electric field at this location...
Saturday, May 21, 2011 at 10:39pm by Kelli Kenyon

Atmospheric Science
The current magnitude of the greenhouse effect is measured by the difference between the emission from the surface and the emission from the top of the atmosphere, G=Ts^4 −Te^4 150 W m-2. What would be the required magnitude of the greenhouse effect to maintain ...
Friday, November 20, 2009 at 4:34pm by Sandra

Physics
An object slides down a inclined surface in the presence of kinetic friction forces. At the given inclination the kinetic friction force is found to be of magnitude 90 N. Now, the angle that the surface makes with respect to the horizontal is increased and the object continues...
Thursday, October 22, 2009 at 3:21pm by Nikita

physics
There is a very large horizontal conducting plate in the x-y plane (consider it infinitely large). Its thickness is h . The charge densities on the upper and the lower surfaces are both equal to +σ. The goal of this problem is to find the electric field (magnitude and ...
Wednesday, February 27, 2013 at 1:46am by Anonymous

physics
A negative charge of -0.550 uC exerts an upward 0.200 N force on an unknown charge 0.300 m directly below it. (a) what is the unknown charge (magnitude and sign)? (b) What are the magnitude and direction of the force that the unknown charge exerts on the -0.550 uC charge?
Monday, January 21, 2008 at 12:37pm by Jen

physics
During a Science day learners use a plastic cold drink bottle as a rocket.They use a bicycle pump to increas the presure inside the bottle.When the presure becomes high enough,the bottle is launched vertically upwards into the air.The bottle returns to its original position ...
Sunday, January 22, 2012 at 4:23pm by Thabang

Physics(thank you for the help)
1) A baby elephant is stuck in a mud hole. To help pull it out, game keepers use a rope to apply a force FA. By itself, however, force FA is insufficient. Therefore, two additional forces FB and FC are applied. Each of these additional forces has the same magnitude F. The ...
Sunday, May 27, 2012 at 4:45pm by Hannah

Physics/Math
A 3.0 kg block, initially in motion, is pushed along a horizontal floor by a force F of magnitude 18 N at an angle = 45 with the horizontal. The coefficient of kinetic friction between the block and floor is 0.25. (Assume the positive direction is to the right.) Calculate the...
Saturday, February 10, 2007 at 5:56pm by COFFEE

Physics
A long uniform rod of length 6.66 m and mass 6.74 kg is pivoted about a horizontal, frictionless pin through one end. The rod is released from rest in a vertical position as in the figure. Question 1: At the instant the rod is horizontal, find its angular speed. The ...
Friday, October 31, 2008 at 2:53pm by Jimmy

physics
A jogger accelerates from rest to 2.7 m/s in 2.2 s. A car accelerates from 39.0 to 44.0 m/s also in 2.2 s. (a) Find the acceleration (magnitude only) of the jogger. (b) Determine the acceleration (magnitude only) of the car. (c) Does the car travel farther than the jogger ...
Tuesday, September 7, 2010 at 2:32pm by zac

Physics(Please Help!!)
Matt forgot to put the fabric softener in the wash. As his socks tumbled in the dryer, they became charged. If a small piece of lint with a charge of +1.25 E -19 C is attracted to the socks by a force of 3.0 E -9 N, what is the magnitude of the electric field at this location...
Saturday, May 21, 2011 at 11:14pm by Kelli Kenyon

physics 211
A deep-sea fisherman struggles to bring in a big salmon (see figure below). Find the force each hand must exert on the pole if the tension in the line is 159 N. Neglect the weight of the pole and assume that the force exerted by the left hand is directed along the horizontal...
Monday, April 4, 2011 at 6:49pm by Laura

Physics
A long, thin rod (length = 4.0 m) lies along the x axis, with its midpoint at the origin. In a vacuum, a +5.0 C point charge is fixed to one end of the rod, while a -5.0 C point charge is fixed to the other end. Everywhere in the x, y plane there is a constant external ...
Saturday, January 26, 2013 at 3:03am by Amy

Physics
A long, thin rod (length = 4.0 m) lies along the x axis, with its midpoint at the origin. In a vacuum, a +5.0 C point charge is fixed to one end of the rod, while a -5.0 C point charge is fixed to the other end. Everywhere in the x, y plane there is a constant external ...
Saturday, January 26, 2013 at 2:03pm by Amy

Physics
During a tennis serve, a racket is given an angular acceleration of magnitude 155 rad/s2. At the top of the serve, the racket has an angular speed of 13 rad/s. If the distance between the top of the racket and the shoulder is 1.5 m, find the magnitude of the total acceleration...
Wednesday, March 26, 2008 at 6:06pm by Zach

physics
four forces act on a hot air ballon 356 N north 129 N west 297 N east 156 N south a)find the magnitude of the resultant force on the balloon. i already found this one out. i got magnitude to be 261.197N b) find the direction of the resultant force (in relation to the 297 N ...
Tuesday, October 14, 2008 at 9:01pm by Claudia

physics
Hi! could anyone help me please, I have no idea how to this at all. I try to it but, the did not get the right answer. Thank for your help Oppositely charged parallel plates are separated by 5.34 mm. A potential difference of 600 V exists between the plates. (a) What is the ...
Saturday, February 6, 2010 at 4:34pm by Chan

Science
chilean quake's richter magnitude: 8.5 taiwan earthquake's richter magnitude: 7.6 about how much more energy was released by the chilean quake than the taiwan earthwquake? a. twice as much b. ten times as much c. thirty two times as much d. one thousand times as much i think ...
Monday, March 16, 2009 at 10:05pm by Angie

physics
A diving board length = 6.00 m that weighs 210 N is supported by two pillars. One pillar is at the left end of the diving board, as shown below; the other is distance d = 1.60 m away.Find the magnitude of the force exerted by the left pillar when a 90.0 kg diver stands at the ...
Saturday, November 27, 2010 at 4:42pm by Cerra

physics
PLEASE EXPLAIN A charge moves a distance of 1.7 cm in the direction of a uniform electric field having a magnitude of 200 N/C. The electrical potential energy of the charge decreases by 9.69095 10−19 J as it moves. Find the magnitude of the charge on the moving ...
Tuesday, February 16, 2010 at 6:16pm by Jonathan

Physics
A loaded penguin sled weighing 60 N rests on a plane inclined at 20 to the horizontal. Between the sled and the plane the coefficient of static friction is 0.27, and the coefficient of kinetic friction is 0.13. (a) What is the minimum magnitude of the force F, parallel to the...
Tuesday, February 19, 2013 at 6:15pm by Rachel

Physics...PLZ!! =)
A conducting rod whose length is 25 cm is placed on a U-shaped metal wire that has a resistance R of 8 . The wire and the rod are in the plane of the paper. A constant magnetic field of strength 0.4 T is applied perpendicular and into the paper. An applied force moves the rod...
Tuesday, March 12, 2013 at 9:19am by Liz

physics
Rocket-powered sleds are used to test the responses of humans to acceleration. Starting from rest, one sled can reach a speed of 444 m/s in 1.80 s and can be brought to a stop again in 2.15 s. (a) Calculate the acceleration of the sled when starting, and compare it to the ...
Tuesday, September 21, 2010 at 10:21pm by Anonymous

Physics
This is my homework problem: "The pilot of a plane is flying at 450 mi/hr W 20.0 degrees S relative to the earth. She sees another plane flying at 350 mi/hr N 40.0 degrees W relative to her plane. What was the magnitude and direction of the plane she saw relative to the earth...
Thursday, October 7, 2010 at 6:08pm by Tii

phy
a watermelon seed has the following coordinates: x= -5.0, y = 8.0m, and z = 0m. find its position vector (a) in unit-vector notation and as (b) a magnitude and (c) an angle relative to the positive direction of the x axis (d) sketch the vector on the right-handed coordinate (3...
Saturday, February 9, 2013 at 7:32am by stephen

Physics
4. A football player passes the ball. The ball leaves his hand and is caught 1.7 seconds later by a receiver 30 meters away. (You may assume the ball was caught at the same height from which it was thrown.) a) What is the vertical component of the velocity of the ball just ...
Friday, October 5, 2012 at 1:14am by Anonymous

college physics
Superman must stop a 190-km/h train in 180m to keep it from hitting a stalled car on the tracks. part a)If the train's mass is 3.810^5kg , how much force must he exert (find the magnitude)? part b)Compare to the weight of the train (give as %). partc) How much force(in ...
Sunday, April 29, 2012 at 4:59pm by john

Physics
There is a very large horizontal conducting plate in the x-y plane (consider it infinitely large). Its thickness is h . The charge densities on the upper and the lower surfaces are both equal to +σ. The goal of this problem is to find the electric field (magnitude and ...
Monday, February 25, 2013 at 8:41am by P

PHYSICS
1.Two trolleys X and Y with momenta 20 Ns and 12 Ns respectively travel along a straight line in opposite directions before collision. After collision the directions of motion of both trolleys are reversed and the magnitude of the momentum of X is 2 Ns. What is the magnitude ...
Friday, May 24, 2013 at 10:45am by ROSELINE

APphysics
During the launch from a board, a divers angulad speed about her center of mass changes from zero to 5.4 rad/s in 450 ms. Her rotational inertia about her center of mass is 12 kg times m^2. During launch, what was the magnitude of her average angular accerlertation? During the...
Monday, January 28, 2008 at 6:06am by ed

Science (Please Respond SOON!)
I think I'm using the wrong formulas or SOMETHING... Here's the question: "Two equal charges are separated by 3.7 10^-10 m. The force between the charges has a magnitude of 2.37 10^-3 N. What is the magnitude of q on the charges?" Here's my work: F = kc(q1q2/r^2) 2.37 x 10...
Thursday, May 7, 2009 at 3:54am by Judy

Physics
There are two conducting concentric hollow spheres of outer radii R2 and R1 ( R2>R1 ). The thickness of the material of both spheres is d . The inner sphere is negatively charged with charge density -σ1, . The larger sphere is positively charged with charge density +&#...
Monday, February 25, 2013 at 8:38am by P

Physics
There are two conducting concentric hollow spheres of outer radii R2 and R1 ( R2>R1 ). The thickness of the material of both spheres is d . The inner sphere is negatively charged with charge density -σ1, . The larger sphere is positively charged with charge density +&#...
Wednesday, February 27, 2013 at 1:46am by Anonymous

physics
A door, essentially a uniform rectangle of height 2.00 m, width 0.78 m, and weight 136.0 N, is supported at one edge by two hinges, one 18.1 cm above the bottom of the door and one 181.9 cm above the bottom of the door. Calculate the horizontal components of the forces on the ...
Sunday, April 10, 2011 at 12:59pm by can't understand the question...help!!!

physics
A door, essentially a uniform rectangle of height 2.00 m, width 0.78 m, and weight 136.0 N, is supported at one edge by two hinges, one 18.1 cm above the bottom of the door and one 181.9 cm above the bottom of the door. Calculate the horizontal components of the forces on the...
Monday, April 11, 2011 at 6:10pm by kim...I need help please!!

physics
In Fig. 8-49, a block slides down an incline. As it moves from point A to point B, which are 3.0 m apart, force acts on the block, with magnitude 3.8 N and directed down the incline. The magnitude of the frictional force acting on the block is 5.3 N. If the kinetic energy of ...
Thursday, October 14, 2010 at 2:12am by Anonymous

physics
A sphere has a radius of 0.20 meters and has a uniform surface charge density equal to 6.3 micro coulombs per meter squared. A second point charge has a magnitude of 0.58 micro coulombs and is 0.61 meters away from the center of the sphere. Find the magnitude of the force ...
Saturday, March 17, 2012 at 10:21pm by doug

Physics
An arrow is fired with a speed of 20.0 m/s at a block of Styrofoam resting on a smooth surface. The arrow penetrates a certain distance into the block before coming to rest relative to it. During this process the arrow's deceleration has a magnitude of 1300 m/s2 and the block'...
Monday, October 12, 2009 at 12:34pm by Robert C

Physics; Elect.
1. A charge (uniform linear density=9.0 nC/m) is distributed along the x-axis from x=0 to x=3.0m. Determine the magnitude of the electric field at a point on the x axis with x=4.0m. a)81 N/C b)74 N/C c)61 N/C d)88 N/C e)20 N/C 2. A +2nC point charge is placed at one corner of ...
Tuesday, February 1, 2011 at 2:53am by Thomas

Physics
The drawing shows a positive point charge +q1, a second point charge q2 that may be positive or negative, and a spot labeled P, all on the same straight line. The distance d between the two charges is the same as the distance between q1 and the spot P. With q2 present, the ...
Friday, September 6, 2013 at 1:57pm by Sarah

Dynamics
A French artillerist, Captain A. Le Duc, developed an empirical formula for the velocity of a projectile in terms of the distance traveled by the projectile in the bore. For a 155-mm gun this equation is v = 3309s /(70 + s) where s is the distance traveled in the bore in ...
Wednesday, January 19, 2011 at 3:12pm by stan

Physics
A block slides down an incline. As it moves from point A to point B, which are 5.0 m apart, a force F acts on the block, with magnitude 2.1 N and directed down the incline. The magnitude of the frictional force acting on the block is 10 N. If the kinetic energy of the block ...
Sunday, March 13, 2011 at 5:30pm by John

physics
can anyone please help me on this one? A circular coil (980 turns, radius = 0.078 m) is rotating in a uniform magnetic field. At t = 0 s, the normal to the coil is perpendicular to the magnetic field. At t = 0.027 s, the normal makes an angle of 45 degrees with the field ...
Sunday, November 18, 2012 at 8:23pm by johnathan

KINEMATICS (PHY)
A turntable is a uniform disc of mass m and radius R. The turntable is initially spinning clockwise when looked down on from above at a constant frequency f0. The motor is turned off at t=0 and the turntable slows to a stop in time t with constant angular deceleration. (a) ...
Tuesday, November 12, 2013 at 1:30am by rickross

algebra based physics
An electron in an oscilloscope tube is traveling horizontally with a speed of 4.4106m/s . It passes through a 2.1cm long region with an electric field pointing upward with a magnitude of 1500N/C. what is the magnitude of the electrons velocity when it emerges from the ...
Monday, February 10, 2014 at 10:13pm by jrfannin

physics
a man stands on the roof of a building that is 30m tall and throws a rock with a velocity of magnitude of 40m/s at an angle of 33 degress a bove the horizontal. Calculate the following: a.) The maximum height above the roof reached by the rock. b.) The magnitude of the ...
Thursday, February 7, 2013 at 6:51am by jm

Physics
The helicopter view in the figure below shows two people pulling on a stubborn mule. Assume that F1 is 130 N, and F2 is 65 N. The forces are measured in units of newtons (N). (a) Find the single force that is equivalent to the two forces shown. In both magnitude and direction...
Wednesday, May 18, 2011 at 2:24pm by anne

physics
A small block with mass 0.0400 kg slides in a vertical circle of radius 0.0700 m on the inside of a circular track. There is no friction between the track and the block. At the bottom of the block's path, the normal force the track exerts on the block has magnitude 3.85 N. ...
Monday, June 4, 2012 at 12:33am by Perry

College Physic I
A space probe is traveling in outer space with a momentum that has a magnitude of 4.99 x 107 kgm/s. A retrorocket is fired to slow down the probe. It applies a force to the probe that has a magnitude of 1.87 x 106 N and a direction opposite to the probe's motion. It fires for...
Saturday, February 25, 2012 at 8:48pm by Angela

Physics
i have been asking physics questions on this and some people give me the formula, i'm getting the correct answers..please can the same people help me on this that helped me before.. A child rides a bicycle in a circular path with a radius of 2.0 m. The tangential speed of the ...
Monday, February 16, 2009 at 7:50pm by y912f

Physics Classical Mechanics
A turntable is a uniform disc of mass m and radius R. The turntable is initially spinning clockwise when looked down on from above at a constant frequency f0. The motor is turned off at t=0 and the turntable slows to a stop in time t with constant angular deceleration. (a) ...
Thursday, November 7, 2013 at 1:52pm by A

Physics
A loaded penguin sled weighing 60 N rests on a plane inclined at 20 to the horizontal. Between the sled and the plane the coefficient of static friction is 0.25, and the coefficient of kinetic friction is 0.18. (a) What is the minimum magnitude of the force F, parallel to the...
Wednesday, October 28, 2009 at 4:44pm by Karen

Physics
A 10-kg box is at rest on a horizontal frictionless surface, at the end of an unstretched horizontal spring with constant k = 4000 N/m. The mass is then quickly struck with a hammer that imparts an impulse along the horizontal direction, compressing the spring a maximum ...
Tuesday, February 18, 2014 at 12:08am by Taylor

Physics
A 10-kg box is at rest on a horizontal frictionless surface, at the end of an unstretched horizontal spring with constant k = 4000 N/m. The mass is then quickly struck with a hammer that imparts an impulse along the horizontal direction, compressing the spring a maximum ...
Tuesday, February 18, 2014 at 1:48am by Taylor

Physics... Please Help
An arrow is fired with a speed of 20.0 m/s at a block of Styrofoam resting on a smooth surface. The arrow penetrates a certain distance into the block before coming to rest relative to it. During this process the arrow's deceleration has a magnitude of 1300 m/s2 and the block'...
Wednesday, October 14, 2009 at 1:46pm by Robert C

Physics
A barbell is mounted on a nearly frictionless axle through its center. The low-mass rod has a length d = 0.27 m, and each ball has a mass m = 0.2 kg. At this instant, there are two forces of equal magnitude F applied to the system as shown in the figure, with the directions ...
Saturday, November 27, 2010 at 5:45pm by Adam

physics
A rectangular loop of wire with sides 0.196 and 0.584 m lies in a plane perpendicular to a constant magnetic field (see part a of the drawing). The magnetic field has a magnitude of 0.723 T and is directed parallel to the normal of the loop's surface. In a time of 0.249 s, one...
Wednesday, February 6, 2013 at 10:05pm by PLEASE HELP

Physics
A proton is projected perpendicularly into a magnetic field that has a magnitude of 0.32 T. The field is then adjusted so that an electron will follow a circular path of the same radius when it is projected perpendicularly into the field with the same velocity that the proton ...
Thursday, September 29, 2011 at 10:09pm by Breanna

physics
A flat circular coil with 113 turns, a radius of 3.64 10-2 m, and a resistance of 0.524 Ω is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field is changing at a rate of ΔB/Δ...
Tuesday, October 22, 2013 at 11:40pm by Anonymous

Physics
A loaded penguin sled weighing 81 N rests on a plane inclined at angle θ = 21 to the horizontal (Fig. 6-23). Between the sled and the plane, the coefficient of static friction is 0.24, and the coefficient of kinetic friction is 0.13. (a) What is the minimum magnitude of ...
Sunday, October 10, 2010 at 4:41pm by Alaina

Physics
A loaded penguin sled weighing 73 N rests on a plane inclined at angle θ = 21 to the horizontal (Fig. 6-23). Between the sled and the plane, the coefficient of static friction is 0.24, and the coefficient of kinetic friction is 0.19. (a) What is the minimum magnitude of ...
Saturday, October 1, 2011 at 11:01am by Granger

physics
A loaded penguin sled weighing 75 N rests on a plane inclined at angle θ = 24 to the horizontal (Fig. 6-28). Between the sled and the plane, the coefficient of static friction is 0.25, and the coefficient of kinetic friction is 0.13. (a) What is the minimum magnitude of ...
Sunday, October 23, 2011 at 6:55pm by Taylor

Physics
A loaded penguin sled weighing 66 N rests on a plane inclined at angle θ = 24 to the horizontal (Fig. 6-23). Between the sled and the plane, the coefficient of static friction is 0.22, and the coefficient of kinetic friction is 0.13. (a) What is the minimum magnitude of ...
Sunday, October 23, 2011 at 11:12pm by Ted

physics
An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid has a mass of 4.9 104 kg, and the force causes its speed to change from 7600 to 5400 m/s. (a) What is the work done by the force? (b) If the ...
Monday, February 28, 2011 at 11:25am by shaknocka

Physics
I already figured out the answers to some but I need help with two more. 1) A disk with an initial angular velocity ω0 = 4.5 rad/s experiences a constant angular acceleration of α = 7.5 rad/s2 for time t = 15 s. Please answer the following questions. ω0 = 4.5 ...
Wednesday, April 2, 2014 at 11:06am by Michelle

Atmospheric Science
The current magnitude of the greenhouse effect is measured by the difference between the emission from the surface and the emission from the top of the atmosphere, G =σTs 4 −σTe 4 ≈ 150 W m-2. What would be the required magnitude of the greenhouse ...
Sunday, November 22, 2009 at 4:33pm by donna

Physical science
The engine of a car is being lifted out of the car by using a pulley system. The weight of the engine is 8000N. Use a scale diagram to determine the horizontal force, F1 that a mechanic has to use to hold the engine in such a position that the rope makes an angle of 30degrees ...
Wednesday, March 7, 2012 at 4:36pm by Pamela

Physics
On a safari, a team of naturalists sets out toward a research station located 4.0 km away in a direction 42 north of east. After traveling in a straight line for 2.3 km, they stop and discover that they have been traveling 30 north of east, because their guide misread his ...
Saturday, September 15, 2012 at 9:28am by Harsh Patel

Physics
A 3.70kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.470. Determine the kinetic frictional force that acts on the box when (a) The elevator is stationary. (b) The elevator is accelerating ...
Friday, January 27, 2012 at 9:01pm by Sejul

physics
Three identical blocks connected by ideal strings are being pulled along a horizontal frictionless surface by a horizontal force . (Figure 1) The magnitude of the tension in the string between blocks B and C is = 3.00 . Assume that each block has mass = 0.400 . Part A What is ...
Saturday, September 29, 2012 at 8:34pm by sammy

Physics
A 6.00 Kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.360. Determine the kinetic frictional force that acts on the box when the elevator (a) is stationary (b) accelerating upward with an ...
Wednesday, November 7, 2012 at 6:34pm by Kathryn

physics
A charge moves a distance of 1.4 cm in the direction of a uniform electric field having a magnitude of 244 N/C. The electrical potential energy of the charge decreases by 108.3 10−19 J as it moves. Find the magnitude of the charge on the moving particle. The electrical...
Friday, February 8, 2013 at 10:30am by EMily

Physics
***EXTRA CREDIT*** An arrow is fired with a speed of 20.0 m/s at a block of Styrofoam resting on a smooth surface. The arrow penetrates a certain distance into the block before coming to rest relative to it. During this process the arrow's deceleration has a magnitude of 1300 ...
Tuesday, October 13, 2009 at 3:35pm by Robert C

Physics
A 2.90 kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.320. Determine the kinetic frictional force that acts on the box for each of the following cases a)The elevator is stationary b) The ...
Monday, February 15, 2010 at 11:00pm by anonymous

physics
A 5.10 kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.450. Determine the kinetic frictional force that acts on the box for each of the following cases. (a) The elevator is stationary. (b) The...
Monday, September 20, 2010 at 11:58pm by Dawn

Physics - please help
A 3.70kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.470. Determine the kinetic frictional force that acts on the box when (a) The elevator is stationary. (b) The elevator is accelerating ...
Saturday, January 28, 2012 at 8:52am by Sejul

physics
there are 3 parts to my question. i need help on the last part. 1.a. A child rides a bike in a circular path with a radius of 2.0 m. The tangential speed of the bike is 2.0 m/s. The combined mass of the bike and the child is 43 kg. What is the magnitude of the bike's ...
Saturday, February 21, 2009 at 1:30pm by Bella

Physics PLEASE HELP!
A flat circular coil with 97 turns, a radius of 4.04 10-2 m, and a resistance of 0.528 Ω is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field is changing at a rate of ΔB/Δt...
Thursday, March 14, 2013 at 4:20am by Nixon

Please Help with 2 Physics Problems???
1) In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the picture. The tire remains stationary in spite of the three pulls. Alex pulls with force FA of magnitude 207 N, and Charles pulls with force FC of ...
Monday, February 17, 2014 at 1:18am by Tyler

physics
An amusement park ride consists of a car moving in a vertical circle on the end of a rigid boom of negligible mass. The combined weight of the car and riders is 5.1 kN, and the circles radius is 10 m. At the top of the circle, what are the (a) magnitude FB and (b) direction (...
Tuesday, March 2, 2010 at 8:55pm by beav

college physics
A 5.10 kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.450. Determine the kinetic frictional force that acts on the box for each of the following cases. (a) The elevator is stationary. (b) The...
Monday, September 20, 2010 at 8:07pm by Denise

physics
A soccer ball is kicked with an initial speed of 10.8 m/s in a direction 24.9 above the horizontal. Calculate the magnitude of its velocity 0.310 s after being kicked. What was its direction? Calculate the magnitude of its velocity 0.620 s after being kicked. What was its ...
Thursday, September 5, 2013 at 11:25am by Anonymous

physics
A soccer ball is kicked with an initial speed of 10.8 m/s in a direction 24.9 above the horizontal. Calculate the magnitude of its velocity 0.310 s after being kicked. What was its direction? Calculate the magnitude of its velocity 0.620 s after being kicked. What was its ...
Thursday, September 5, 2013 at 11:28am by Anonymous

Physics
Imagine that a person is seated in a chair that is suspended by a rope that goes over a pulley. The person holds the other end of the rope in his or her hands. Assume that the combined mass of the person and chair is M. What is the magnitude of the downward force the person ...
Monday, January 16, 2012 at 6:50pm by T

physics
A truck is pulling a car. FT is the magnitude of the force that the truck exerts on the car FC is the magnitude of the force that the car exerts on the truck Consider the following scenarios independently. 1)The truck is driving with a constant velocity, but as it turns out, ...
Thursday, February 13, 2014 at 8:45pm by Jane

Physics 1
6. /1.5 points CJ8 4.P.014. My Notes | . Question Part Points Submissions Used 1 2 /1 /0.5 0/7 0/1 Total /1.5 When a parachute opens, the air exerts a large drag force on it. This upward force is initially greater than the weight of the sky diver and, thus, slows him down...
Wednesday, October 3, 2012 at 12:47pm by Donald

Physics
Can someone please provide me with some insight on this question? A pair of scissors is being used to cut a string. Does each blade of the scissors have the same angular velocity (both magnitude and direction) at a given instant? yes no Give your reasoning. The answer is no. ...
Tuesday, April 24, 2007 at 12:21am by Jim

Physics
A positively charged particle of mass 5.60 10-8 kg is traveling due east with a speed of 60 m/s and enters a 0.49-T uniform magnetic field. The particle moves through one-quarter of a circle in a time of 1.20 10-3 s, at which time it leaves the field heading due south. All ...
Thursday, April 4, 2013 at 4:14pm by Don

Physics
A positively charged particle of mass 5.60 10-8 kg is traveling due east with a speed of 60 m/s and enters a 0.49-T uniform magnetic field. The particle moves through one-quarter of a circle in a time of 1.20 10-3 s, at which time it leaves the field heading due south. All ...
Thursday, April 4, 2013 at 8:56pm by Don

Physics/Math
For the vectors a = (3.9 m)i + (4.8 m)j, and b = (5.4 m)i - (2.0 m)j, give the x and y components, magnitudes, and directions of the following vector operations. (a.) a + b ______(x component) ______(y component) ______(magnitude) ______ (direction from the positive x axis) (...
Saturday, January 27, 2007 at 4:02am by TechnoBoi11

Physics
a small body of mass m revolving in a horizontal circle with velocity V of a constant magnitude at the end of a cord of length L. As the body swings around its path, the cord sweeps over the surface of a cone. The cord makes an angle with the vertical, so the radius of the ...
Wednesday, February 16, 2011 at 1:00pm by Cole

Physics
A person stands on a scale in an elevator. As the elevator starts, the scale has a constant reading of 600 N. As the elevator later stops, the scale reading is 396 N. Assume the magnitude of the acceleration is the same during starting and stopping. A)Determine the wieght of ...
Friday, April 1, 2011 at 9:02pm by Kate

Physics
A beam of electrons traveling with a speed of 3.00 x 107 m/s enters a uniform, downward electric field of magnitude 1.17 x 104 N/C between the deflection plates of an oscilloscope (the figure below ). The initial velocity of the electrons is perpendicular to the field. The ...
Tuesday, January 31, 2012 at 10:02pm by Ashley

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