Wednesday

April 16, 2014

April 16, 2014

Number of results: 96,787

**physics**

A 62.0 kg diver falls from rest into a swimming pool from a height of 3.50 m. It takes 1.92 s for the diver to stop after entering the water. Find the magnitude of the average force exerted on the diver during that time.
*Thursday, February 28, 2008 at 7:30pm by rory*

**physics**

A 62.0 kg diver falls from rest into a swimming pool from a height of 3.50 m. It takes 1.92 s for the diver to stop after entering the water. Find the magnitude of the average force exerted on the diver during that time.
*Saturday, March 1, 2008 at 3:53pm by rory*

**PHYSICS**

An electron is initially at rest in, but not on the axis of, a solenoid that is carrying a steady current I directed as shown in the cross section below. The electron is initially at rest on the -x axis. The current in the solenoid is suddenly increaed to 2I. In what direction...
*Sunday, December 15, 2013 at 5:11pm by Marc*

**Physics**

Force = rate of change of momentum = (momentum out - momentum in)/time momentum out = -50*10^-3*18 kg m/s momentum in = +50*10^-3*28 momentum out - momentum in = -50*10^-3*46 Force = -50*10^-3*46/3.5*10^-3 s acceleration = Force/mass = -46/3.5*10^-3 = -13.1*10^3 = 1.31*10^4 m/s^2
*Wednesday, October 8, 2008 at 7:45pm by Damon*

**physics please hep**

Suppose that the graph of force vs. time for a very unusual spring has only straight lines. The cart hits the spring at t = 3.00 s, so force F = 0 up to that point. Then, after t = 3.00 s, the force increases linearly until it reaches a maximum at Fmax = 6.74 N at time t = 3....
*Monday, November 1, 2010 at 10:21pm by taylor*

**physics**

1. A man pulls a 300 N object across a horizontal surface using a 100 N force applied at a 35° angle. What is the normal force? If the object is pulled at constant speed, what is the coefficient of friction? normal force would be N=mg f+sin
*Wednesday, October 13, 2010 at 11:43am by physics LSU*

**physics**

Two spherical objects are separated by a distance of 1.41 × 10^-3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As a result, each ...
*Thursday, February 14, 2013 at 5:21pm by shaun*

**Calculus**

A particle, initially at rest, moves along the x-axis such that its acceleration at time t>0 is given by a(t)=cos(t). At the time t=0, its position is x=3. How do I find the position function for the particle? I tried integrating the equation but got confused.
*Monday, October 17, 2011 at 8:25pm by Anonymous*

**Phusics**

The kinetic energy of an object is 1/2*m*v^2, so an object moving in the y direction will have a speed, and therefore also kinetic energy (KE) If you apply a force in the Y direction the velocity will not necessarily increase, only if the object experiences a net force. For ...
*Sunday, December 2, 2012 at 4:05pm by Jennifer*

**Physics**

3 charges are arranged along the x-axis. q1 = -4.50 nC is located at x = 0.200m q2 = +2.50 nC is located at x = -0.300m q3 = is a positive character located at the origin. What is the value of q3 for the net eletric force on it to be 4*10^-6 N? I found the charge on q3 to be...
*Monday, January 16, 2012 at 8:49pm by Kyle*

**Physics**

Let t be the time measured from when the velocity is 50 m/s V = 50 + a t If T is the time it takes to go from 50 to 80 m/s, V(t) = 50 + 30 t/T (The acceleration is a = 30/T) Now integrate for X(t) X(t) = 50 t + 15 t^2/T X(T) = 50 T + 15 T = 65 T (point B location) X(0) = 0 (...
*Tuesday, August 23, 2011 at 8:43am by drwls*

**physics**

In this problem you will determine the average velocity of a moving object from the graph of its position as a function of time . A traveling object might move at different speeds and in different directions during an interval of time, but if we ask at what constant velocity ...
*Sunday, January 30, 2011 at 8:16pm by Bre*

**PHYSICS**

according the graph sown, the net force acting on an object varies wth the object's displacement.calculate the work down by the force on the object at the various displacements listed below (i won't bother telling you since you don't have a graphy, but I figured out the work ...
*Friday, January 29, 2010 at 7:58pm by Sarah N H*

**physics**

The driver of a 1300 kg car, initially traveling at 10.1 m/s, applies the brakes, bringing the car to rest in a distance of 16.5 m. (a) Find the net work done on the car. (b) Find the magnitude and direction of the force that does this work. (Assume this force is constant.) ...
*Wednesday, February 22, 2012 at 5:52pm by Henry*

**physics**

What can we conclude from the attractive nature of the force between a positively charged rod and an object? 1. Cannot be determined. 2. The object is an insulator. 3. The object is a conductor.
*Saturday, February 20, 2010 at 7:47pm by Anonymous*

**English Expression**

What time does school start? It starts at 8:50 a.m. How long is lunch time? It is 50 minutes long. How many classes do you have in the afternoon? I have 2 or 3 classes. All the rest are correct. Congrats! =)
*Tuesday, May 13, 2008 at 5:29am by Writeacher*

**Physics**

Force down = m g Force up = F sin 50 + .245 F cos 50 so to keep it from falling F (sin 50 + .245 cos 50) = m g to start it upwards, reverse the friction force F (sin 50 -.245 cos 50) = m g
*Wednesday, June 6, 2012 at 6:24pm by Damon*

**Physics**

the displacement of an object of 1 kg mass as a function of time t in x-y plane is given by x = 20t + 30t^2 and y = 25 - 40t in the units of meters -the units of x and y are in meters and t is in seconds -the force acting on the object is -and then there's 5 answers
*Saturday, April 10, 2010 at 6:30pm by Allomabian*

**Physics**

the displacement of an object of 1 kg mass as a function of time t in x-y plane is given by x = 20t + 30t^2 and y = 25 - 40t in the units of meters -the units of x and y are in meters and t is in seconds -the force acting on the object is -and then there's 5 answers
*Saturday, April 10, 2010 at 6:33pm by Allomabian*

**physics**

A 33.0 kg box initially at rest is pushed 5.95 m along a rough, horizontal floor with a constant applied horizontal force of 145 N. If the coefficient of friction between box and floor is 0.300. find: the work done by the applied force the increase in internal energy in the ...
*Friday, October 14, 2011 at 1:17pm by gene*

**Physics**

Initially sliding with a speed of 2.1 m/s, a 2.1 kg block collides with a spring and compresses it 0.35 m before coming to rest. What is the force constant of the spring?
*Saturday, March 13, 2010 at 9:44pm by Helen Batt*

**physics again...**

A 62.0 kg diver falls from rest into a swimming pool from a height of 3.50 m. It takes 1.92 s for the diver to stop after entering the water. Find the magnitude of the average force exerted on the diver during that time.
*Thursday, February 28, 2008 at 9:03pm by rory*

**calculus**

three forces with magnitudes 100, 50, and 80 lb act on an object at angles of 50 degree, 160 degree, and -20 degree respectively. ind the direction and magnitude o the resultant force.
*Tuesday, January 8, 2013 at 11:25pm by sarah*

**Physics**

A 2.00-kg object is hanging on a 1.1m string. The object is pulled 20cm away from the equilibrium position and held there. a) What is the pulling force in the string when the object is kept still ? b) Now the object is released, what is the speed of the object when it goes ...
*Monday, March 24, 2014 at 6:17pm by Physics: Pendulum*

**Physics**

A 15 N force is needed to move an object with constant velocity of 5 m/s. What power must be delivered to the object by the force? I konw that P=W/t and W=Fd But other than that I am confused . I am not sure how i would solve this problem.
*Tuesday, October 16, 2007 at 8:59pm by Andrea*

**Physics**

An object falling under the pull of gravity is acted upon by a frictional force of air resistance. The magnitude of this force is approximately proportional to the speed of the object, which can be written as f = bv. Assume b = 19 kg/s and m = 59 kg. What is the terminal speed...
*Monday, September 22, 2008 at 11:02am by Jenny*

**physics**

If net force on an object is zero, then it is not accelerating, either at rest, or moving at constant veloicty NetForce= mass*acceleration
*Tuesday, February 23, 2010 at 5:10pm by bobpursley*

**Conservation if Linear Momentum**

A student (m = 66 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.04 s. The average force exerted on him by the ground is +18000 N, where the upward direction is taken to be the positive direction. From ...
*Sunday, February 26, 2012 at 9:47am by Angela*

**physics**

a football punter accelerates from rest to a speed of 8 m/s during the time in which his toe is in contact with the ball (about 0.21 s). If the football has a mass of 0.50 kg, what average force does the punter exert on the ball?
*Sunday, November 20, 2011 at 10:05pm by marissa*

**U Hart**

The 50 kg cylinder shown, which was initially at rest, rolls without slipping. when the speed of A is 20 cm\s, the speed of point B is most nearly
*Monday, January 14, 2013 at 1:54pm by Jason*

**physics**

A mechanic pushes a 2.50 x 10^3 kg car from the rest to a speed of v, doing 5000J of work in the process. During this time, the car moves 25.0 m. Neglecting friction between car and road, find (a) v and (b) the horizontal force exerted on the car.
*Monday, October 22, 2007 at 10:42pm by Anonymous*

**physics 11**

a 4.00kg object traveling westward at 25.0m/s hits a 15.0kg object at rest. the 4.00kg object bounces eastward at 8.00m/s. what is the speed and direction of the 15.0kg object?
*Wednesday, May 15, 2013 at 6:34pm by Kyla*

**Physics**

An 1800-kg car starting from rest accelerates constantly during the first 9.50 s of its motion. If the force acting on the car is 2150 N, what is the car;s speed at the end of this time? 2150 N = 1800 kg. (a) a = 1.194 (1.194)(9.5 s) = 11.347 m/s correct? correct. Vfinal= a*time
*Tuesday, October 3, 2006 at 6:59pm by Fred*

**Physics**

A 0.700 kg object attached to the end of a 0.560 meter wire revolves uniformly on a flat, frictionless surface. a) If the object makes three complete revolutions per second, what is the force exerted by the wire on the object? b) What is the speed of the object?
*Thursday, January 6, 2011 at 6:30pm by Lee*

**Physics**

In a vacuum, two particles have charges of q1 and q2, where q1 = +3.8C. They are separated by a distance of 0.37 m, and particle 1 experiences an attractive force of 4.7 N. What is the value of q2, with its sign? Two spherical objects are separated by a distance of 1.45 × 10-3...
*Monday, August 26, 2013 at 1:45pm by Liz*

**chemistry**

The heat capacity of object B is twice that of object A. Initially A is at 300 K and B is at 450 K. They are placed in thermal contact and the combination is isolated. The final temperature of both objects is:
*Monday, June 22, 2009 at 5:43pm by matt*

**physics**

sorry mr bob purlsey again to annoy you. so i did all my calculations and read about hooke's law yesterday and presented to my teacher. however i was not allowed to used hooke's law because we haven't learned it yet and i did not know how to connect potential energy to force ...
*Thursday, June 14, 2007 at 11:16pm by physics(sorry)*

**geometry**

Two forces are pushing on an object, one at 12 lbs of Force and one at 5.66 lbs of Force. The angle between them is 35° (each is 72.5 from horizontal, such that the forces make a v with the object in the center). 17. What is the total Force on the object? 18. What is the ...
*Tuesday, December 6, 2011 at 2:17pm by Cam*

**geometry**

Two forces are pushing on an object, one at 12 lbs of Force and one at 5.66 lbs of Force. The angle between them is 35° (each is 72.5 from horizontal, such that the forces make a v with the object in the center). 17. What is the total Force on the object? 18. What is the ...
*Tuesday, December 6, 2011 at 5:08pm by Cam*

**geometry**

Two forces are pushing on an object, one at 12 lbs of Force and one at 5.66 lbs of Force. The angle between them is 35° (each is 72.5 from horizontal, such that the forces make a v with the object in the center). 17. What is the total Force on the object? 18. What is the ...
*Friday, December 16, 2011 at 9:30am by Cameron*

**physics**

a 1.5-kg object moves up the y-axis at a constant speed. When it reaches the origin,the forces F1 =5.0 N at 37 deg above the the + x-axis, F2 = 2.5 N in the +x-direction, F3 = 3.5 N at 45 deg below the -x-axis, and F4 = 1.5 N in the -y direction are applied to it(a) Will the ...
*Thursday, January 17, 2008 at 5:51pm by melissa*

**physics**

first, recall formula for Force: F = ma where m = mass in kg, and a = acceleration in m/(s^2) then also recall the formula for acceleration,, acceleration is change in velocity over time, thus: a = (v - v0)/t where v = final velocity in m/s v0 = initial velocity in m/s t = ...
*Thursday, October 28, 2010 at 11:54pm by jai*

**physics**

first, recall formula for Force: F = ma where m = mass in kg, and a = acceleration in m/(s^2) then also recall the formula for acceleration,, acceleration is change in velocity over time, thus: a = (v - v0)/t where v = final velocity in m/s v0 = initial velocity in m/s t = ...
*Thursday, October 28, 2010 at 11:56pm by jai*

**Physics**

a 9.50-g bullet. moving horizontally with an initial speed vi , embeds itself in a 1.45-kg pendulum bob that is initially at rest. The length of the pendulum is L=0.745m. After the collision, the pendulum swings to one side and comes to rest when it has gained a vertical ...
*Friday, August 5, 2011 at 2:19pm by AfterLife*

**Physics HELP PLEASE**

two spherical objects are separated by a distance of 9x10^-3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As a result, each object ...
*Tuesday, September 18, 2007 at 9:24pm by Will*

**Math**

Which point on the circle x^2+y^2-12x-4y=50 is closest to the origin? Which point is farthest from the origin? Explain.
*Tuesday, September 21, 2010 at 10:17pm by Danielle*

**math**

Which point on the circle x^2+y^2-12x-4y=50 is closest to the origin? Which point is farthest from the origin? Explain.
*Wednesday, September 22, 2010 at 5:35pm by joyce*

**Physics**

A 1100 kg car is moving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to rest in a distance of 140 m. (a) If the road is completely level, what is the constant force applied to the car to bring it to rest? (...
*Thursday, September 16, 2010 at 1:41am by Phil*

**calculus**

Suppose the following about a certain object: I. The object's altitude is a function of time, represented by the function A(x) where here x is time. II. The temperature of the object is a function of its velocity, represented by the function T(x), where here x is the object's ...
*Wednesday, November 26, 2008 at 12:59pm by matt*

**Physics**

A car accelerates from rest at 5 m/s^2 for 5 seconds. It moves with a constant velocity for some time, and then decelerates at 5 m/s^2 to come to rest. The entire journey takes 25 seconds. Plot the velocity-time graph of the motion. They don't give me a graph so I made one. I ...
*Tuesday, April 15, 2008 at 7:16pm by Jon*

**Physics, please help**

Hello, I don't know how about to answering this question: work out the problem of a ball of mass m that falls a distance h from rest. It hits the floor and rebounds to its starting height. (a) What total time ie required for the motion? (Neglect the time of contact with the ...
*Tuesday, October 31, 2006 at 9:12am by amber*

**physics**

A hockey puck with mass 0.160kg is at rest on the horizontal, frictionless surface of a rink. A player applies a force of 0.310N to the puck, parallel to the surface of the ice, and continues to apply this force for 1.60s. What is the (a)position and (b)speed at time end?
*Wednesday, November 14, 2012 at 9:09pm by Force and direction*

**Re: Physics/Math**

A single force acts on a 5.0 kg particle-like object in such a way that the position of the object as a function of time is given by x = 3.0t - 4.0t 2 + 1.0t 3, with x in meters and t in seconds. Find the work done on the object by the force from t = 0 to t = 2.0 s. For ...
*Friday, March 2, 2007 at 12:19am by Technoboi11*

**winterWx**

A soccer player kicks a soccer ball of mass 0.45 kg that is initially at rest. The force of the kick is given by F(t) = [(5×106)t - (2.5×109)t2] N for 0 ≤ t ≤ 2.0×10-3 s, where t is in seconds. (The player's foot is in contact with the ball for 2.0×10-3 s.) Find ...
*Friday, February 23, 2007 at 2:47am by Physics/Math*

**Trig Math**

From the origin on the x-axis draw a line at 45 degrees with length 50 From the origin draw a line 30 degrees down into the fourth quadrant with length 75 So the angle between the two forces is 75 degrees. Complete the parallelogram and draw the diagonal. That diagonal is the ...
*Monday, March 29, 2010 at 9:27pm by Reiny*

**Intro to Physics**

The gravitational force exerted on a solid object is 5.15 N as measured when the object is suspended from a spring scale. When the suspended object is submerged in water, the scale reads 4.00 N. Find the density of the object.
*Wednesday, November 7, 2012 at 9:51pm by Amy*

**Phys**

A stationary 50 kg circular object (r0=.25m) is on a 30 degree incline. The coefficient of rolling friction between the block and the incline is 0.05. If it moves for 3 seconds, what is the angular displacement of the object at this time?
*Thursday, November 20, 2008 at 9:23pm by Phys*

**PHYSICS**

1. A sound with a frequency of 261.6 Hz travels through water at a speed of 1435 m/s. What is the wavelength of the wave? a. 1.83 x 10 -1 m b. 3.753 x 10 5 m c. 5.486 m d. You cannot tell from the given information 2. A 23.0 kg mass of is accelerated at + 4.50 m/s2. What is ...
*Friday, December 21, 2012 at 2:26am by Hayden*

**physics**

The formula is µ = f / N, where µ is the coefficient of friction, f is the amount of force that resists motion, and N is the normal force. Normal force is the force at which one surface is being pushed into another. If a rock that weighs 50 newtons is lying on the ground, then...
*Tuesday, September 25, 2007 at 7:33pm by Ben*

**physics**

1. A man pulls a 300 N object across a horizontal surface using a 100 N force applied at a 35° angle. What is the normal force? If the object is pulled at constant speed, what is the coefficient of friction
*Wednesday, October 13, 2010 at 2:46am by devin boutte*

**Physics**

An object (mass 3.2kg ) slides upward on a vertical wall at constant velocity when a force F of 54N acts on it at an angle of 60∘ to the horizontal. N = 27 N Determine the force of kinetic friction on the object.
*Thursday, October 3, 2013 at 3:24pm by Cheech*

**Physics (Liquids)**

I have a question about fluids ok... I've been told that Pressure = (density of fluid) (gravity) (height) ok that's great in all but I don't see how it works... Pressure = (Force perinduclar to area force is acting on)/(Area force is acting on) ok this great and all but leads ...
*Wednesday, October 21, 2009 at 8:39pm by Physics (Liquids)*

**physics **

A force 1 of magnitude 5.40 units acts at the origin in a direction 45.0° above the positive x axis. A second force 2 of magnitude 5.00 units acts at the origin in the direction of the positive y axis. Graphically find the magnitude and direction of the resultant force 1 + 2.
*Wednesday, September 12, 2012 at 8:55pm by carlton*

**Geometry**

Two forces are pushing on an object, one at 12 lbs of Force and one at 5.66 lbs of Force. The angle between them is 35° (each is 72.5 from horizontal, such that the forces make a v with the object in the center). 17. What is the total Force on the object? 18. What is the ...
*Tuesday, June 5, 2012 at 7:05pm by Amber *

**Physics**

A 20 kg table initially at rest on a horizontal floor requires a 136 N horizontal force to set it in motion. Once the table is in motion, a 71 N horizontal force keeps it moving at a constant velocity. What is the coefficient of kinetic friction between the table and floor?
*Wednesday, January 4, 2012 at 3:07pm by Mackenzie *

**physical science 2**

the force required to maintain an object at a constant velocity in free space is equal to: b: the mass of the object. c: the force required to stop it. d zero
*Saturday, January 29, 2011 at 9:13pm by ellen*

**physics**

A 15kg object is pushed to the right with a net force of 60N. If a 5kg object experiences the same acceleration, how much force is it being pushed with.
*Thursday, December 8, 2011 at 1:00pm by Rosie*

**physical science**

. Three forces, each 10 lb, act on the same object. What is the maximum total force they can exert on the object? The minimum total force?
*Thursday, July 5, 2012 at 10:51pm by sara*

**science**

A 15kg object is pushed to the right with a net force of 60N. If a 5kg object experiences the same acceleration, how much force is it being pushed with?
*Friday, July 26, 2013 at 12:39am by trina*

**physics**

A force of 34.5 newtons is applied to an object at an angle of 45 º with the horizontal. What is the force acting on the object in the horizontal direction?
*Wednesday, January 25, 2012 at 1:26pm by Anonymous*

**physics **

The masses of blocks A and B are 4.5 kg and 3.7 kg respectively. The blocks are initially at rest and are connected by a massless string passing over a massless, frictionless pulley. The system is released from rest. a. What is the acceleration of the blocks? b. What is the ...
*Sunday, November 24, 2013 at 7:05pm by Nickoli *

**physics - i need A.S.A.P**

An object of mass 1.5 kg is placed on a rough horizontal surface, as shown in Figure 1. Force F acts on the object. When the magnitude of F is 10 N, the object just begins to slide. Determine the coefficient of static friction between the object and the surface. i do not know ...
*Monday, May 2, 2011 at 1:02pm by mimi*

**Physics**

1.A 24 kg crate initially at rest on a horizon floor requires a 75 N horizontal force to set it in motion, once the crate is in motion, a horizontal force 53 N keeps the crate moving with a constant velocity. Find the coefficient of kinetic friction, between the floor and crate.
*Monday, October 19, 2009 at 6:58pm by Bob*

**physics**

An object of mass 1,5 kg,is pulled along a rough horizontal surface by a horizontal force F.calculate the value of F if the force of friction is 1,3 N and the object accelerates at 2m.s-2
*Sunday, January 22, 2012 at 4:10pm by Mluleki*

**physics**

A constant force of 20N is applied tangentially to a string wound on the rim of a 40 cm diameter wheel, initially at rest. (i) How much work does this force do as it turns the wheel through 45„a? (3 %) (ii) If the wheel has mass 8.0 kg and radius of gyration 15 cm, how long ...
*Tuesday, July 20, 2010 at 8:53am by Oisin*

**physics**

A 1.5-kg object moves up the y-axis at a constant speed. When it reaches the origin, the forces F1 = 5.0 N at 37 degrees. above the +xaxis, F2 N in the +X direction, F3 = 3.5 N at 45 degrees below the -X axis, and the F4 = 1.5 N in the - y direction are applied to it. a)Will ...
*Friday, January 18, 2008 at 2:52pm by Will*

**physics**

A net force of 1.6×10−15 N acts on an electron over a displacement of 5.0 cm, in the same direction as the net force. (a) What is the change in kinetic energy of the electron in joules? (b) If the electron was initially at rest, what is the speed of the electron in m/s? ...
*Tuesday, March 8, 2011 at 4:43pm by jamaisa*

**physics**

The force acts on a 1.2kg object at 120m/s. The direction of the force is aligned with the velocity. What is the new velocity of the object
*Thursday, December 16, 2010 at 12:04pm by Sarah*

**physics**

It Takes 2 N of force to get a 15 kg object to move horizontally on a surface. What is the normal force of the surface on the object?
*Tuesday, November 8, 2011 at 1:45pm by Kai*

**physics**

A 75 kg skydiver in free fall is subjected to a crosswind exerting a force of 60 N and to a vertical air resistance force of 100 N. Calculate the resultant force acting on the skydiver [6 marks] and his angle of fall (relative to vertical) [6 marks].
*Tuesday, February 7, 2012 at 12:57pm by alex*

**nature of science**

four forces are being applied to move an object to the left. Force 1 is pushing to the right at 200N. Force 2 is pushing to the left at 500N. Force 3 is pushing to the right at 100N. Force 4 is pushing to the left at 50N. What's the net force acting on this object? A. 250N B. ...
*Friday, November 15, 2013 at 8:37am by science*

**physics**

a book,initially at rest is pushed along a horizontal table top by a horizontal force of 2N. After 1s it has been moved 1.5m. The force of friction is 0.4N a.how much work is done on the book by the 2N force? b.how much work is done on the book by friction? c.what is the books...
*Sunday, January 27, 2013 at 2:14pm by confidence*

**physics**

Two people push on a 4 kg object. One force is 60N, north. The second force is 40N, east. Find the acceleration of the object. Ignore friction. The answer is 18m/s/s at 53.31 degrees.......but i don't know how to get to it.
*Saturday, September 11, 2010 at 9:41pm by Wendy*

**physics**

Two spherical objects are separated by a distance of 2.41 x 10-3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As a result, each object...
*Wednesday, February 11, 2009 at 7:19pm by Jordan*

**AP Physics B**

An object of mass 3.2 kg is allowed to fall from rest under the force of gravity for 3.5 s. What is the change in its momentum? Ignore air resistance.
*Wednesday, December 8, 2010 at 7:56pm by Jamie*

**please help me!! physics **

The masses of blocks A and B are 4.5 kg and 3.7 kg respectively. The blocks are initially at rest and are connected by a massless string passing over a massless, frictionless pulley. The system is released from rest. a. What is the acceleration of the blocks? b. What is the ...
*Sunday, November 24, 2013 at 6:34pm by Nickoli *

**Physics: Equilibrium and Inclined Planes**

Two forces act on an object. One force is 8.0 N horizontally and the second is 10.0 N vertically. Find the force that will produce equilibrium for the object.
*Sunday, October 28, 2007 at 7:59pm by Anayeli*

**math**

You omitted some words in your question. How can you rest on a force? This is a physics question. The math is trivial. If 50 N is pushing the block, and the static friction coefficient is 0.45, a friction force of up to 0.45 M g = 88 N will tend to keep it in place. 50 N is ...
*Sunday, November 27, 2011 at 2:17am by drwls*

**physics**

A football punter accelerates a football from rest to a speed of 8 m/s during the time in which his toe is in contact with the ball (about 0.16 s). If the football has a mass of 0.50 kg, what average force does the punter exert on the ball?
*Wednesday, February 17, 2010 at 8:27pm by mel*

**physics**

a football punter accelerates a football from rest to a speed of 7 m/s during the time in which his toe is in contact with the ball (about 0.18 s). If the football has a mass of 0.50 kg, what average force does the punter exert on the ball?
*Sunday, November 20, 2011 at 8:33pm by marissa*

**physics**

A football punter accelerates a football from rest to a speed of 9 m/s during the time in which his toe is in contact with the ball (about 0.22 s). If the football has a mass of 0.50 kg, what average force does the punter exert on the ball?
*Wednesday, September 26, 2012 at 11:00pm by Anonymous*

**Physics**

A 23.0 kg block is initially at rest on a horizontal surface. A horizontal force of 80.0 N is required to set the block in motion. After it is in motion, a horizontal force of 57.0 N is required to keep the block moving with constant speed. Find the coefficients of static and ...
*Tuesday, November 2, 2010 at 6:14pm by Maria*

**physics**

A 20kg block is initially at rest on a rough, horizontal surface. A horizontal force of 75N is required to set the block in motion. After it is in motion, a horizontal force of 60N is required to keep the block moving with constant speed. Find the coefficient of static and ...
*Thursday, March 6, 2014 at 5:27pm by kmae*

**physics**

An object with a mass of 3.4 kg is originally at rest on a horizontal, frictionless surface frictionless which is at the top of a frictionless incline with a length of 6 meters which is inclined at 28.9 degrees. Someone's hand applies a force to the object over some ...
*Wednesday, October 31, 2012 at 9:26am by Chelsea*

**Help me please with physics**

A 25kg mass is on a level, rough surface where the force of friction is a constant 15 N. A horizontal applied force of 65 N acts on the mass. The mass is initially at rest. a) what speed does the mass have after 4.0 seconds? b) what speed does the mass have after being moved 2...
*Friday, October 15, 2010 at 7:13pm by Nicole*

**Physics**

A massless string runs around two massless, frictionless pulleys, where one pulley is attached to the ceiling, and the other is suspended with a mass m. An object with mass m = 17 kg hangs from one pulley. A force F is exerted on the free end of the string to lift the object ...
*Tuesday, November 17, 2009 at 10:05pm by Nikita*

**physics**

suppose the glider is initially at rest at x=0, with the spring unstretched. You then apply a constant force in the +x direction with magnitude 0.610 N to the glider. what is the glider's velocity when it has moved 0.100m?
*Friday, August 17, 2012 at 10:15am by zianna*

**physics**

suppose the glider is initially at rest at x=0, with the spring unstretched. You then apply a constant force in the +x direction with magnitude 0.610 N to the glider. what is the glider's velocity when it has moved 0.100m?
*Sunday, August 19, 2012 at 2:08am by Carl*

**physics**

suppose the glider is initially at rest at x=0, with the spring unstretched. You then apply a constant force in the +x direction with magnitude 0.610 N to the glider. what is the glider's velocity when it has moved 0.100m?
*Wednesday, August 22, 2012 at 8:54am by Carl*

**physics**

suppose the glider is initially at rest at x=0, with the spring unstretched. You then apply a constant force in the +x direction with magnitude 0.610 N to the glider. what is the glider's velocity when it has moved 0.100m?
*Wednesday, August 22, 2012 at 11:29pm by zianna*

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