Saturday

September 24, 2016
Number of results: 38,904

**physics**

A particle that hangs from a spring oscillates with an angular frequency ω. The spring-particle system is suspended from the ceiling of an elevator car and hangs motionless (relative to the elevator car) as the car descends at a constant speed v. The car then stops ...

*October 6, 2010 by flame*

**physics**

A particle that hangs from a spring oscillates with an angular frequency ω. The spring-particle system is suspended from the ceiling of an elevator car and hangs motionless (relative to the elevator car) as the car descends at a constant speed v. The car then stops ...

*October 7, 2010 by flame*

**physics**

A particle that hangs from a spring oscillates with an angular frequency ω. The spring-particle system is suspended from the ceiling of an elevator car and hangs motionless (relative to the elevator car) as the car descends at a constant speed v. The car then stops ...

*October 8, 2010 by flame*

**Algebra**

In triangle PQR shown, point S (not shown)is on QR between Q and R. Give one possible value for the length of PS ...Explain your reasoning.. Triangle PQR = 13" PQ = 6" QR = 2" PR = 5" I need help in figuring this out this triangle with an equation or expression...thank you

*May 13, 2009 by JAY10*

**Physic**

A wheel-and-axle system shown consists of two coaxial wheels of radius r = 2 meters and R = 6 meters. The forces applied to the system as shown in the diagram are: F1 = 80 N F2 = 80 N F3 = 40 N F4 = 30 N If counterclockwise is positive, what is the net torque on this system?

*November 25, 2012 by Anonymous*

**Physic**

A wheel-and-axle system shown consists of two coaxial wheels of radius r = 2 meters and R = 6 meters. The forces applied to the system as shown in the diagram are: F1 = 80 N F2 = 80 N F3 = 40 N F4 = 30 N If counterclockwise is positive, what is the net torque on this system?

*November 25, 2012 by Anonymous*

**Physics**

1. A science teacher wanting to demonstrate centripetal acceleration holds a bucketful of water by its handle and spins it in a vertical circle. If the teacher’s arm is 1.15m long, at what speed must the bucket be rotated so that at the top of its path there is no tension ...

*December 10, 2015 by Anonymous*

**Physics**

The pulley system shown in the figure is used to lift a 52-{\rm kg} crate. Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. The crate is rising with an acceleration of 2.5 m/s^2. Determine the tension in ...

*March 10, 2012 by JO*

**physic**

A 0.34 kg particle has a speed of 2.0 m/s at point A and kinetic energy of 7.5 J at point B. (a) What is its kinetic energy at A? _____ J (b) What is its speed at point B? _____ m/s (c) What is the total work done on the particle as it moves from A to B? _____ J thank you so much

*October 20, 2009 by Chan*

**physics**

A small sphere of mass m = 7.50 g and charge q1 = 32.0 nC is attached to the end of a string and hangs vertically as shown in the figure. A second charge of equal mass and charge q2 = –58.0 nC is located a distance d = 2.00 cm below the first charge. (a) Find the tension in ...

*November 6, 2012 by renee *

**classical physics**

Question 14 Give reasons for the answers to each of the following questions: a) Can a normal force be horizontal? b) Can a normal force be directed vertically downward? c) Consider a tennis ball in contact with a stationary floor and with nothing else. Can the normal force be ...

*March 22, 2013 by Pritesh*

**physics Only one part left !!!!!! PLZ HELP**

A uniform, square metal plate with side L = 3.50 cm and mass 0.087 kg is located with its lower left corner at (x, y) = (0, 0) as shown in the figure. Two squares with side length L/4 are removed from the plate. (a) What is the x-coordinate of the center of mass? = L/2 (b) ...

*March 7, 2011 by HELP!!!!*

**physics Only one part left !!!!!! PLZ HELP**

A uniform, square metal plate with side L = 3.50 cm and mass 0.087 kg is located with its lower left corner at (x, y) = (0, 0) as shown in the figure. Two squares with side length L/4 are removed from the plate. (a) What is the x-coordinate of the center of mass? = L/2 (b) ...

*March 7, 2011 by HELP!!!!*

**Physics**

The position of a toy locomotive mobing on a straight track along the x-axis is given the equation x=t^3-6t^2 +9t where x is in metters and t is in seconds. The net force on the locomotive is equal to zero when t is eqaul to a) zero b)2 s c)3 s d)4s e)5s Would the answer be b)...

*March 25, 2007 by Tammy*

**physics**

A 50-kg box is being pushed a distance of 6.4 m across the floor by a force P with arrow whose magnitude is 154 N. The force P with arrow is parallel to the displacement of the box. The coefficient of kinetic friction is 0.24. Determine the work done on the box by each of the ...

*June 21, 2015 by Lola*

**Physics**

A small bead of mass m is constrained to move along a frictionless track as shown. The track consists of a semicircular portion of radius R followed by a straight part. At the end of the straight portion there is a horizontal spring of spring constant k attached to a fixed ...

*October 10, 2013 by asha*

**science**

1.act against the direction of motion and gets larger as an object moves faster 2. an object acted upon by a net force will accelerate in the direction of that force. 3.the speed an object reaches when the force of gravity is balanced by the force of air resistance

*September 21, 2008 by karen*

**science**

1.act against the direction of motion and gets larger as an object moves faster 2. an object acted upon by a net force will accelerate in the direction of that force. 3.the speed an object reaches when the force of gravity is balanced by the force of air resistance

*September 21, 2008 by karen*

**physical science**

during a football game two players try to tackle another player.one player applies a force of 50.0 n to the east. a second player applies a force of 120.0 n to the north . what is the total applied force?and what is themagnitude and direction of the force

*October 11, 2011 by sarah arcand*

**physics**

The figure shows two points in an E-field: Point 1 is at (X1,Y1) = (3,4), and point 2 is at (X2,Y2) = (12,9), with coordinates in meters. The electric field is constant, with a magnitude of 53 V/m, and is directed parallel to the +x axis. The potential at point 1 is 1200 V. ...

*February 25, 2008 by Samantha*

**Math**

Figure undergoes a sequence of transformation that include dilutions. The figure and its final image are congruent explain how.

*April 12, 2016 by Khan*

**writting a program**

Speed of Sound. Sound travels through air as a result of collisions between the molecules in the air. The temperature of the air affects the speed of the molecules, which in turn affects the speed of sound. The velocity of sound in dry air can be approximated by the formula...

*February 23, 2012 by sarah*

**Physics**

A painter of weight 1000N stands 1.0m from the left-hand end of a uniform plank which is 5.0m long and weighs 800N. The plank is supported by two trestles each 0.5m from the opposite ends. Thre are two upward forces P and Q acting on the plank due to the trestles. By taking ...

*October 6, 2015 by Muhammad Asad*

**physics charges. please help!**

A charge Q = +4.5 uC is located at the origin and is fixed so that it cannot move. A small object with mass m = 2.0 g and charge q = +8.0 uC is released from rest at point A on the x-axis at x = 2.0 cm. The small object moves without friction along the x-axis under the ...

*November 12, 2012 by Matt*

**Physics**

A force of 3.00 N acts through a distance of 12m in the direction of the force.Find the work done. Work=force*distance*CosTheta where theta is the angle between force and distance.

*September 16, 2006 by fluffy*

**Physics**

A 2.92 kg block starts from rest at the top of a 30° incline and accelerates uniformly down the incline, moving 1.93 m in 1.60 s. (a) Find the magnitude of the acceleration of the block. __ m/s2 (b) Find the coefficient of kinetic friction between the block and the incline. ...

*March 2, 2016 by Cheyenne*

**Physics! Help **

Calculate the net or resultant force in N in x direction given that F1=96.2 N is applied at angle of α=55.4° and a second F2=11.6 N is applied at angle of β=41.2°. See attached figure. Express your answer to 4 significant figures.

*May 29, 2014 by Siobhan*

**Physics**

Three point charges are located at the corners of an equilateral triangle as in the figure below. Find the magnitude and direction of the net electric force on the 1.65 μC charge. (Let A = 1.65 μC, B = 6.60 μC, and C = −4.20 μC.)

*September 5, 2015 by Audrey*

**physics urgent!**

The magnetic field in the region shown below is increasing by 5 T/s. The circuit shown (with R=25 , C=55 µF, dimensions 1 m by 2 m) is inserted into the region as shown. The capacitor is initially uncharged. 1. What is the current in the circuit at the moment the circuit is ...

*November 12, 2011 by sonia*

**Physics**

Calculate the work done by the applied force accelerating a 2 kg object at 3 m/s/s over 4 m if there is a 2.5 frictional force of resistance. I calculated using F=ma=6N; then net force = 6N-2.5N=3.5 N so W=fd=14J. Did I do this correctly? Thanks

*April 6, 2009 by KC*

**physics**

a wheel revolves about a fixed horizontal axis through O. During a certain interval of time, the angular velocity (which initially is 20 rad per second clockwise) changes uniformly at such a rate that the angular displacement is 60 rad counterclockwise, and the total angle ...

*January 31, 2011 by stan*

**Physics**

A 10kg mass is located at the (1.00m)i + (2.00m)j + (2.00m)k. A 5kg mass is located at (-1.00m)i + (1.00m)j + (1.00m)k. (A) Determine the moment of inertia of this system about an axis through the origin parallel to the x-axis. (B) Determine the moment of inertia of this ...

*November 29, 2014 by Matt*

**Physics**

A proton travelling 1.5x10^6 m/s enters 2 vertically charged parallel plates held 0.15m apart. The top plate is held at +250V and the bottom is grounded (0V). A magnetic field can be applied to the area between the plates to counteract the electric force acting on the proton. ...

*February 2, 2015 by Sandara*

**Physics - Center of Mass**

A 32-cm-by-32-cm checkerboard has a mass of 120 g. There are four 19-g checkers located on the checkerboard, as shown in the figure. Relative to the origin located at the bottom left corner of the checkerboard, where is the center of mass of the checkerboard-checkers system?

*June 16, 2012 by Newman*

**calculus**

Determine whether the graph of the equation is symmetric with respect to the x-axis, y-axis, line y=x, line y=-x, or none of these. x+y=6 Do I have to move the y and 6 to the other side of the equations or does it not matter? Also, if I do, when I test using the equation a^2...

*August 11, 2010 by James*

**Chemistry**

If the equilibirium reaction is 2 03(g) <--> 3 O2 9(g) is first order with respect to ozone, what type of plot( meaning what is plotted on the y axis vs what is plotted on the x-axis) will yield a straight line? what will the slope of the line represent? PLEASE help im ...

*January 23, 2011 by Amber*

**physics**

In the figure, forces A, B, C and D each have magnitude 50.0 N and act at the same point on the object. What torque (magnitude and direction) does A force exert on the object about point P? What torque (magnitude and direction) B does force exert on the object about point P? ...

*April 12, 2008 by Erin*

**Physics**

A rock of mass m = 1.8 kg is tied to a string of length L = 2.4 m and is twirled in a vertical circle as shown in the figure below. The speed v of the rock is constant; that is, it is the same at the top and the bottom of the circle. If the tension in the string is zero when ...

*October 26, 2011 by Freud*

**Physics**

Two objects are connected by a massless string, as shown in the figure below. The incline and pulley are frictionless. (a) Find the acceleration of the objects. (Assume that positive acceleration is to the right for m1 and downward for m2. Answer using m1 for m1, m2 for m2, g ...

*July 8, 2015 by Anonymous*

**physics**

take a satalite going around the earth... what allows us to say net force (radial) = Fg = Fr = ma were the Fg is the force of gravity exerted on the satalite were Fr is radial force and ma is the mass and acceleration of the satalite ok I understand newtons second law but what...

*August 17, 2009 by physics*

**Linear Momentum in Rotational motion**

It is known that for a mass (m) that moves with velocity (v) the linear momentum is (m)x(v). Now, assume we have a rod of mass (m) and radius (R) that rotates with constant angular velocity (w). Also, isolate only half of the cycle (rotation for 180 degrees). What is the ...

*February 11, 2007 by Nikos*

**physics**

A new type of spring is found where the spring force F is given by F=-kx + bx^2 where k=400 N/ m and b=100 N/m^2 and x is the expansion (or compression) of the spring from its equilibrium position. The spring is attached to a point mass of 1 kg sitting on a horizontal ...

*April 4, 2011 by Physics*

**Physics/Mechanics**

We will obtain bending moment diagrams for three beams and calculate stresses inside the beams. For each beam, take the x-axis along the neutral axis of the beam, oriented from left to right, with origin at A. HW7_1A_1 : 5.0 POINTS For the beam above, obtain symbolic ...

*June 18, 2013 by MAN*

**Math**

if y varies directly as x find the direct variation equation for the situation: y=20 and x=16

*October 19, 2007 by George*

**Algebra 2**

Find an equation of variation where y varies directly as x and inversely as the square of w, and y=24 when x=8 and w=3.

*April 13, 2008 by Amanda*

**Algebra 2**

Find an equation of variation where y varies directly as x and inversely as the square of w, and y=24 when x=8 and w=3.

*April 13, 2008 by Amanda*

**math**

If y varies inversely as x,find the inverse variation equation for the situation y=65 when x=9

*March 15, 2010 by Kari*

**college algebra**

Solve each variation problem. n varies directly as q, and n= 39 when q=3. Find n when q=8.

*April 23, 2010 by BJ*

**math**

Could you help me in solving the following problem? If x varies inversely as the square of y and x=2 when y=1 find x when y=2

*May 4, 2010 by vidya*

**Algebra 2**

Find rarition constant and an equation of variation where y varies directly as x and y =60 when x = 10.

*October 23, 2010 by Anonymous A*

**Algebra 2**

M Varies jointly with A and T and inversley with H. Write and equation that represents the relationship.

*December 14, 2010 by Karl*

**12 grade math**

If Y varies inversely as X^2, determine what Y would be if X = 2 and another point on the equation is (1,8).

*April 18, 2011 by ki*

**College Algebra**

y varies directly as the third power x and inversely as Z. If y=16 when x=4 and z=8,find y when x=9 and z=6

*October 23, 2011 by Ally*

**math**

A varies directly as x and B is inversely proportional to x^2. Given that y= A+B and that y= 19 when x=2 or 3, express y in terms of x.

*February 20, 2012 by YOY*

**Please Help!! Math**

If c varies directly as the square root of d, and c = 14 when d = 64, find c when d = 324.

*June 5, 2013 by Jnr John*

**math**

write the direct variation equation for the following:y varies directly with x and y=60 when x=10

*June 11, 2013 by lina*

**math(algebra)**

If f(x) varies directly with x, and f(x) = 45 when x=9, find the value of f(x) when x=3 answer choices are A. f(x)=8x B. f(x)=4/3x C. f(x)=6x D. f(x)=3/4x

*February 19, 2014 by Ayriana*

**algebra**

Determine whether y varies directly with x if so find the constant of variation k 3y=-7 x-18

*March 4, 2014 by snow*

**algebra 1**

if y varies inversely with x' find the constant of variation and write an equation if y=1/2 and x=-10

*May 26, 2014 by Jennifer*

**Algebra 2**

Write an equation for the relationship z varies jointly with x and the square of y, and inversely with r and s.

*January 11, 2015 by nancy*

**direct variation **

For the statements below, y varies directly with x. Find y when x = −0.3.

*March 22, 2016 by shaka*

**college physics**

Two cars of equal mass are traveling as shown in the figure below just before undergoing a collision. Before the collision, one of the cars has a speed of 19 m/s along +x, and the other has a speed of 31 m/s along +y. The cars lock bumpers and then slide away together after ...

*February 24, 2011 by lala*

**college physics**

Two cars of equal mass are traveling as shown in the figure below just before undergoing a collision. Before the collision, one of the cars has a speed of 19 m/s along +x, and the other has a speed of 31 m/s along +y. The cars lock bumpers and then slide away together after ...

*February 24, 2011 by lala*

**physics**

A block of mass 39 kg lies on an inclined plane, as shown. The horizontal and vertical supports for the plane have lengths of 36 m and 15 m, respectively, and the coefficient of kinetic friction between the plane and the block is 0.3. The magnitude of the force ~F necessary to...

*October 6, 2010 by christine*

**Physics**

Consider three force vectors ~ F1, ~ F2, and ~ F3. The vector ~ F1 has magnitude F1 = 86 N and direction θ1 = 169◦; the vector ~ F2 has magni- tude F2 = 46 N and direction θ2 = 240◦; and the vector ~ F3 has magnitude F3 = 45 N and direction θ3 = 132...

*September 6, 2009 by Nanhi*

**physics**

Figure 5-53 shows a man sitting in a bosun's chair that dangles from a massless rope, which runs over a massless, frictionless pulley and back down to the man's hand. The combined mass of man and chair is 95.4 kg. With what force magnitude must the man pull on the rope if he ...

*June 4, 2011 by Ajay*

**Physics Urgent please help**

A physical pendulum consists of a body of mass contained in the xy-plane. The moment of inertia of the object about an axis perpendicular to the plane and passing through the object's center of mass is I_cm . The object oscillates in the xy-plane about the point S a distance d...

*November 13, 2013 by Ramana*

**chemistry**

testing bronsted lowry reaction predictions...... im super stuck can someone help me steo by step how to figure this out assuming i use the 5 step process? write a balanced chemical equation for ch3coona and hcl reaction position of equilibrium. I know that ch3coo is a SB and ...

*November 20, 2012 by Tara*

**physics**

Multiple Concept Example 9 provides background pertinent to this problem. The magnitudes of the four displacement vectors shown in the drawing are A = 17.0 m, B = 10.0 m, C = 11.0 m, and D = 23.0 m. Determine the (a) magnitude and (b) direction for the resultant that occurs ...

*January 30, 2016 by Lydia*

**physics**

The accelerating force of the wind on a small 200-kg sailboat is 707 N north. If the drag of the keel is 500 N acting west, what is the acceleration of the boat? A) 1.5 m/s2 35 degrees north of east B) 2.5 m/s2 55 degrees north of west C) 3.0 m/s2 35 degrees north of east D) 4...

*June 14, 2010 by anonymous*

**poly**

the volume of the solid generated by revolving infinite region bounded by x-axis, x=k, and y=1/x+2 in the first quadrant about the x-axis to generate a solid. Find the volume of the solid.

*October 31, 2010 by Baohua*

**calculus**

1. Let R be the region in the first quadrant enclosed by the graphs of y=4-X , y=3x , and the y-axis. a. Find the area of region R. b. Find the volume of the solid formed by revolving the region R about the x-axis.

*March 9, 2012 by Taeyeon*

**Math**

1. a triangle has vertices at (0,0), (2,1),(1,3). About which line could the triangle be resolved, in order to form one cone? A) the line at x=2y B) the line at y=3x C) the x-axis D) the y-axis Could someone please explain how to do this? Thank you.

*August 31, 2015 by Tim*

**Physics**

Galileo’s law of falling bodies states that the rate of fall caused by gravity is the same for all objects, regardless of weight. This means that all objects have a free-falling acceleration of 9.8m/s2. However, a significant contradiction of this theory is the fact that a ...

*June 25, 2015 by Aurora*

**physics**

A small circular object with mass m and radius r has a moment of inertia given by I = cmr2. The object rolls without slipping along the track shown in the figure. The track ends with a ramp of height R = 3.0 m that launches the object vertically. The object starts from a ...

*March 27, 2012 by Adam*

**Physics**

A small circular object with mass m and radius r has a moment of inertia given by I = cmr2. The object rolls without slipping along the track shown in the figure. The track ends with a ramp of height R = 3.0 m that launches the object vertically. The object starts from a ...

*March 28, 2012 by Adam*

**Physics**

A 0.300 kg puck, initially at rest on a frictionless horizontal surface, is struck by a 0.215 kg puck that is initially moving along the x axis with a velocity of 2.14 m/s. After the collision, the 0.215 kg puck has a speed of 1.14 m/s at an angle of q = 53.5 deg to the ...

*September 30, 2012 by Arthur*

**Math: graphing check**

for this x < 3 would I put a dot on 3 (on the y-axis) and it would be a dotted line just through 3 vertical. and which side would be shaded the right side where the x-axis is negatives.

*August 31, 2010 by Amy~*

**math**

The region in the first quadrant bounded by the 𝑦-axis and the curve 𝑥 = 2𝑦2 − 𝑦3 (graph please) is revolved about the 𝑥-axis. Find the volume?

*July 17, 2016 by ANON*

**Physics**

a 25 kg box is released from rest on a rough inclined plane tilted at an angle of 33.5 degrees to the horizontal. The coefficient of kinetic friction between the box and the inclined plane is 0.200. a. determine the force of kinetic friction acting on the box b. determine the ...

*February 25, 2012 by Allie*

**physics **

A sign that has a mass of 10.0kg is suspended by two wires, as shown below. (wire 1 is at a 40 degreee angle with the sign, wire 2 is at no angle) Determine the force exerted by each wire in supporting the sign. \in cluse a free-body diagram as part of your response.

*October 7, 2011 by ANdrea*

**Physics**

A 4.29 kg block starts from rest at the top of a 31.8 degrees incline and slides 2.22 m down the incline in 1.22 s. The acceleration of gravity is 9.8 m/s^2. What is the acceleration of the block? Answer in units of m/s^2 What is the coeﬃcient of kinetic friction ...

*November 19, 2012 by Anonymous*

**Physics**

A heavy concrete panel is being lifted into position in a building by means of a crane (see figure below). The tension of 2.52 104 N in the supporting cable produces a torque with respect to point O. (Let L = 41.0 m.) (a) Does this torque tend to rotate the panel clockwise or ...

*July 25, 2012 by Velma*

**physics**

a 25.0kg box is released from rest on a rough inclined plane tilted at an angle of 33.5 degrees to the horizontal. the coefficient of kinetic friction between the box and the inclined plane is 0.200. determine the force of kinetic friction acting on the box. determine the ...

*March 16, 2012 by Anonymous*

**Physics**

A bullet with a mass m = 4:83 g and initial speed of 330 m/s passes through a wheel which is initially at rest as in the The wheel is a solid disk with mass M = 2.29 kg and radius R = 1.:6 cm. The wheel rotates freely about an axis through its center and out of the plane shown...

*December 25, 2011 by Lindsay*

**Physics**

In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.41 × 106 m/s. Find the central force acting on the electron as it revolves in a circular orbit of radius 4.92 × 10−11 m. Answer in units of N. i used 9.10938188 × 10-31 as my mas and ...

*June 22, 2011 by JRD*

**Physics**

A 6 µC charge is placed at the origin and a second charge is placed on the x-axis at x = 0.34 m. If the resulting force on the second charge is 4.0 N in the positive x-direction, what is the value of its charge?

*July 14, 2011 by Cynthia*

**Physics**

A car of mass 1396 kg is parked on a very slippery hillside (see figure below). To keep it from sliding down the hill (č = 15°), the owner attaches a cable. If there is no frictional force between the road and the tires, what is the tension in the cable?

*October 19, 2012 by Lily*

**Help Physics**

A child with a mass of 39 kg stands on a spring scale inside an elevator. For each of the scenarios below, draw a force diagram of the forces acting on the child and calculate the reading of the scale in newtons. (a) The elevator is at rest. _______ N (b) The elevator is ...

*October 9, 2012 by arcos15*

**Physics**

The ultracentrifuge is an important tool for separating and analyzing proteins in biological research. Because of the enormous centripetal accelerations that can be achieved, the apparatus must be carefully balanced so that each sample is matched by another on the opposite ...

*March 24, 2013 by Leanna*

**physics **

A 1.o kg cart A and 2.0 kg cart B are at rest on a frictionless table. A cord and a spring of negligible mass join the two carts. The spring is compressed 0.060m between the two carts until the spring's potential energy is 12 Joules. When the cord is cut, the spring will force...

*January 9, 2011 by unknown *

**Physics(Please help)**

1) A force vector has a magnitude of 579 newtons and points at an angle 43o of below the positive x axis. Find the x scalar component and the y scalar component of the vector? For the x component I did 579cos(43) = 423.45 N. Is this correct? For the y component I did 579sin(43...

*May 25, 2012 by Hannah*

**physics!!**

The two masses (m1 = 4.96 kg and m2 = 2.90 kg) in the Atwood's machine shown in the figure below are released from rest, with m1 at a height of 0.800 m above the floor. When m1 hits the ground its speed is 0.203 m/s. Assuming that the pulley is a uniform disk with a radius of ...

*October 21, 2012 by Emily *

**math / science**

find the vector with all of the following properties: magnitude 10 angle of 45 degrees with positive x-axis angle of 75 with positive y-axis positive k component

*December 11, 2011 by Clarissa *

**physics**

First off, thanks a lot for your help. Secondly, will you do it again? A bicyclist traveling with speed v = 3.2m/s on a flat toad is making a turn with radius r = 2.8 m. The forces acting on the cyclist and cycle are the normal force (N) and friction force (Ffr) exerted by the...

*April 13, 2008 by dear drwls*

**Physics**

In the manufacture of a cam, a uniform solid cylinder of radius R is first machined. Then an off-center hole of radius R/2 is drilled, parallel to the axis of the cylinder, and centered at a point a distance R/2 from the center of the cylinder. Then cam, of mass M, is then ...

*May 16, 2007 by Lancelot*

**Physics**

A uniform magnetic field points north; its magnitude is 3.5 T. A proton with kinetic energy 6.0 × 10-13 J is moving vertically downward in this field. What is the magnetic force acting on it? This is what I've done. The answer is incorrect. Please help me find out why. 3.5T to...

*September 22, 2010 by Sar*

**physics**

Hi i'm doing that lab were you attach a weight to a tape which is also through a timer that puts marks on the tape at a given time interval ok I'm asked why is gravity different than on Earth? I don't rember the physics answer behind it I remeber Fg = G((m1 m1)/r^2) to find ...

*August 13, 2009 by physics*

**Algebra**

43. For every real number x, y, and z, the statement (x-y)z = xz - yz is ________ true a. always b. sometimes c. never No idea.. 45. True or False: All equations give only one number as an output for every input number. False? 46. In which quadrant or on which axis would you ...

*May 13, 2010 by mysterychicken*

**physics**

A toy car is given a quick push so that it moves on an inclined ramp. After it is released, it moves up, reaches its highest point and moves back down again. Friction is so small it can be ignored. What net force acts on the car? A. net force of zero B. Net constant force up ...

*July 2, 2011 by alexa*