Friday
April 18, 2014

Search: block horizontal force speed work friction

Number of results: 83,699

physics
A 3.0-kg block is on a frictionless horizontal surface. The block is at rest when, at t = 0, a force (magnitude P = 2.0 N) acting at an angle of 22 above the horizontal is applied to the block. At what rate is the force P doing work at t = 2.0 s? A. 2.3 W B. 2.0 W C. 1.4 W D...
Tuesday, April 27, 2010 at 4:20pm by qambar

mit physyscs
A block of mass 2 kg is initially at rest on a horizontal surface. At time , we begin pushing on it with a horizontal force that varies with time as , where 0.6 N/s . We stop pushing at time s [ for ]. (a) First, assume the surface is frictionless. What is the magnitude of the...
Friday, December 6, 2013 at 10:26am by juanpro

college physics
A block of weight = 35.0 N sits on a frictionless inclined plane, which makes an angle theta = 27.0 with respect to the horizontal. A force of magnitude = 15.9 N, applied parallel to the incline, is just sufficient to pull the block up the plane at constant speed. What is Wg, ...
Thursday, February 25, 2010 at 11:58am by Anonymous

physics
In the system shown in the figure, suppose the block has a mass of 3.3 , the spring has a force constant of 490 , and the coefficient of kinetic friction between the block and the floor is 0.13. Find the work done on the block by the spring and by friction as the block is ...
Thursday, December 8, 2011 at 6:36pm by Patrick Jarvis

physics
1. A piece of rectangular block weighing 5 kg is pressed on a vertical wall by a horizontal force applied to the block. If the coefficient of friction between the block and the wall is 2.0, what force is necessary to keep the block in place? 2. If the force in Prob. 1 is ...
Wednesday, March 20, 2013 at 2:44am by ruby

physics
A block rests on a horizontal frictionless surface. A string is attached to the block, and is pulled with a force of 60.0 N at an angle θ above the horizontal. After the block is pulled through a distance of 2.00 m, its speed is 2.70 m/s, and 43.0 J of work has been done ...
Tuesday, February 25, 2014 at 1:09pm by Jake

Physics
A)A block rests on a horizontal frictionless surface. A string is attached to the block, and is pulled with a force of 60.0 N at an angle θ above the horizontal. After the block is pulled through a distance of 2.00 m, its speed is 2.70 m/s, and 43.0 J of work has been ...
Wednesday, February 26, 2014 at 5:26pm by Tsion

Physics
A block of mass 0.5 kg rests on a smooth inclined plane. It is then pushed by a horizontal force of 16N. When the block has displaced 5m along the inclined plane. What would be the speed of the block if the plane is rough and a friction of 5N is acting on the block?
Sunday, December 5, 2010 at 8:03am by Alex

physics
because of friction, a constant force of 20 N is needed to slide a box across a room to the right at a constant speed, and box is moved 3 m. What is the friction force and how much work is done by friction force?? How much work is done by gravity? How much work is done by ...
Sunday, October 1, 2006 at 1:14am by mitch

Physics
A block of mass m1 = 4.80 kg sits on top of a second block of mass m2 = 15.6 kg, which in turn is on a horizontal table. The coefficients of friction between the two blocks are s = 0.300 and k = 0.100. The coefficients of friction between the lower block and the rough table ...
Saturday, October 31, 2009 at 2:02pm by Annie

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
A 39.0 kg box initially at rest is pushed 4.50 m along a rough, horizontal floor with a constant applied horizontal force of 135 N. If the coefficient of friction between box and floor is 0.300, find the following. (a) the work done by the applied force J (b) the increase in ...
Sunday, April 28, 2013 at 8:23am by Vince

physics
A horizontal force of magnitude 33.5 N pushes a block of mass 3.80 kg a distance of 3.00 m across a floor, where the coefficient of kinetic friction is 0.600. (a) How much work is done by that applied force on the block-floor system?
Sunday, December 18, 2011 at 9:09pm by t.a.

Physics
Starting from rest, a 5.00 kg block slides 2.50 m down a rough 30.0 degree incline. The coefficient of kinetic friction between block and the incline is .436. Determine the work done by the friction force between block and incline and the work done on the normal force?
Wednesday, October 12, 2011 at 5:27pm by Dee

Physics
Starting from rest, a 5.00 kg block slides 2.50 m down a rough 30.0 degree incline. The coefficient of kinetic friction between block and the incline is .436. Determine the work done by the friction force between block and incline and the work done on the normal force
Thursday, October 13, 2011 at 1:40pm by Dee

Physics
A block is pushed across a horizontal surface with a coefficient of kinetic friction of 0.15 by applying a 150 N horizontal force. If the block accelerates at the rate of 2.53 m/s2 (squared), what is the mass of the block?
Monday, October 24, 2011 at 9:39pm by Chris

Physics please help
Starting from rest, a 5.00 kg block slides 2.50 m down a rough 30.0 degree incline. The coefficient of kinetic friction between block and the incline is .436. Determine the work done by the friction force between block and incline and the work done on the normal force?
Wednesday, October 12, 2011 at 6:11pm by Dee

Physics
Two blocks, each with a mass = 0.168 kg, can slide without friction on a horizontal surface. Initially, block 1 is in motion with a speed = 1.28 m/s; block 2 is at rest. When block 1 collides with block 2, a spring bumper on block 1 is compressed. Maximum compression of the ...
Monday, March 5, 2012 at 12:40am by Lilly

physics
Two blocks, each with a mass m = 0.400 kg, can slide without friction on a horizontal surface. Initially, block 1 is in motion with a speed $v$ = 1.20 m/s; block 2 is at rest. When block 1 collides with block 2, a spring bumper on block 1 is compressed. Maximum compression of ...
Wednesday, March 5, 2014 at 6:07pm by Ted

Physics
A 2.97 kg block initially at rest is pulled to the right along a horizontal surface by a constant, horizontal force of 12.9 N. The coefficient of kinetic friction is 0.126. The acceleration of gravity is 9.8 m/s^2. Find the speed of the block after it has moved 2.92 m. ...
Thursday, December 1, 2011 at 8:43pm by Jem

physics
A 13.9 kg block is dragged over a rough, horizontal surface by a 70.7 N force acting at 19.8 degrees above the horizontal. The block is displaced 4.55 m, and the coefficient of kinetic friction is 0.298. How much energy is lost due to friction?
Saturday, October 31, 2009 at 12:19pm by Anonymous

Physics
A force of 40 N is applied at an angle of 30oabove the horizon to a 5 kg block that is at rest on a rough horizontal surface. After the block starts to move with an acceleration of 3 m/s2, what is the coefficient of kinetic friction between the block and the horizontal surface...
Friday, May 15, 2009 at 12:02pm by Angela

Physics
A block rests on a horizontal, frictionless surface. A string is attached to the block, and is pulled with a force of 45.0 N at an angle above the horizontal, as shown in Figure 7-23. After the block is pulled through a distance of 1.50 m its speed is v = 2.90 m/s, and 50.0 ...
Thursday, March 1, 2012 at 8:24pm by Anna

Physics
A block rests on a horizontal, frictionless surface. A string is attached to the block, and is pulled with a force of 45.0 N at an angle above the horizontal, as shown in Figure 7-23. After the block is pulled through a distance of 1.50 m its speed is v = 2.90 m/s, and 50.0 ...
Thursday, March 1, 2012 at 8:32pm by Anna

Physics
A force of 40 N is applied at an angle of 30oabove the horizon to a 5 kg block that is at rest on a rough horizontal surface. After the block starts to move with an acceleration of 3 m/s2, what is the coefficient of kinetic friction between the block and the horizontal surface...
Thursday, May 14, 2009 at 11:44pm by Angela

science
A 2:35 kg block is pushed 1:57 m up a vertical wall with constant speed by a constant force of magnitude F applied at an angle of 67.5 degree with the horizontal. The acceleration of gravity is 9.8 m/s2. If the coefficient of kinetic friction between the block and wall is 0....
Sunday, October 21, 2007 at 1:17pm by aksha

Physics
This is a lot like your previous problem. There is a force 10.4 cos 27.5 or 9.22 N horizontal from the cord. There is a force 10.4 sin 27.5 or 4.80 N up from the cord The force the block exerts down on the floor is the weight - the pull up from the cord m g - 4.80 N = 5.70(9.8...
Tuesday, December 4, 2007 at 9:43pm by Damon

physics
Part 1 A block of mass 4 kg, which has an initial speed of 8 m/s at time t = 0, slides on a horizontal surface.Find the magnitude of the work that must be done on the block to bring it to rest. Answer in units of J. Part 2 If a constant friction force of magnitude 5 Newtons is...
Friday, February 25, 2011 at 7:49pm by ally

Physics
A block (weight= 10kg) is sitting on a surface with friction (coefficient= 0.5). A force (push) is applied to the end of the block, 35 degrees below the horizontal. Calculate the magnitude of the force to move the block.
Tuesday, October 16, 2012 at 8:47pm by Frederic

physics
A block is initially sliding along a horizontal surface with 24.6 J of kinetic energy. Friction causes the blocks speed to be halved in a distance of 3.20 m. a) What is the kinetic energy of the block after traveling the 3.20 m? b) What is the magnitude of the kinetic ...
Monday, July 16, 2012 at 3:29am by Katie

physics (lVERY LONG)
A force of 200 N is being exerted on a blocki, which has a mass of 10 kg and is on 30 degrees inclined plane. The force is acting up the plane and parallel to it. The coefficient of friction between the block and the plane is .3 and the plane is 12 m long. a. What is the ...
Monday, November 22, 2010 at 7:18pm by rhet butler

Physics
How did you get 7.25? What are the dimensions of that number? The answer is not 7.25 Joules. Multiply the horizontal force component by the distance the block moves. That is how to compute the work done. The work done by friction is MINUS the work done by the person pulling. ...
Thursday, January 5, 2012 at 10:53pm by drwls

Physics
horizontal force=friction=8.62cos17 vertical force on block up=8.62sin17 friction force=mu(3.42g-8.62sin17) set this equal to the horizontal force, and solve for mu
Thursday, April 18, 2013 at 9:50pm by bobpursley

physics
a 3.5 kg block is accelerated from rest by a compressed spring of spring constant 640 N/m. The block leaves the spring at the springs relaxation length.The block then travels over a horizontal floor with coefficient of kinetic friction 0.25. The friction force stops the block...
Tuesday, November 23, 2010 at 6:16pm by help

physics
A 3.0 kg block is pushed along a horizontal floor by a force F of magnitude 19 N at an angle θ = 30 with the horizontal. The coefficient of kinetic friction between the block and floor is 0.25.(a) Calculate the magnitude of the frictional force on the block from the ...
Saturday, October 2, 2010 at 2:07pm by Alejandra

physics
A block of mass m1 = 4.50 kg sits on top of a second block of mass m2 = 13.9 kg, which in turn is on a horizontal table. The coefficients of friction between the two blocks are s = 0.300 and k = 0.100. The coefficients of friction between the lower block and the rough table ...
Monday, May 21, 2007 at 2:03pm by micole

Biomechanics
A 10 kg block sits motionless on a table in spite of an applied horizontal force of 2 N. What are the magnitudes of the reaction force and friction force acting on the block?
Thursday, April 18, 2013 at 10:54pm by Jami

Re: Physics/Math
A 17 N horizontal force F pushes a block weighing 6.0 N against a vertical wall. The coefficient of static friction between the wall and the block is 0.68, and the coefficient of kinetic friction is 0.48. Assume that the block is not moving initially. Will the block move? In ...
Saturday, February 10, 2007 at 9:00pm by COFFEE

physics
A block of wood weighing 10newton is placed on the horizontal table,it is then pulled by means of a spring balance attached to one of its ends,the block just begins to move when the spring balance records the horizontal force 5newton.what is the coefficient of static motion ...
Thursday, November 24, 2011 at 12:16am by pearl

Physics
A 4.0 kg block is stacked on top of a 12.0 kg block, whcih is accelerating along a horizontal table at a = 5.2 s^-2 m. Let Mu k = Mu s = Mu. (a) What mininum coefficent of friction Mu between the two blocks will prevent the 4.0 kg block from sliding off? (b) If Mu is only half...
Thursday, August 20, 2009 at 4:33pm by QUESTION

physics
A mass m = 14.0 kg is pulled along a horizontal floor with NO friction for a distance d =8.7 m. Then the mass is pulled up an incline that makes an angle θ = 27.0 with the horizontal and has a coefficient of kinetic friction μk = 0.41. The entire time the massless ...
Monday, October 1, 2012 at 6:32pm by need of help

Physics
The first thing I would ask is about the interface between the blocks, frictionless or not. If the interface is frictionless, the left block slides to the right and UP, and the right moves to the right. IN THAT CASE, consider this: left horizontal force: 112cos30=figure it ...
Friday, May 25, 2012 at 5:00pm by bobpursley

Phsics
What force must be exerted on block A in order for block b not to fall. The coefficient of static friction between block A and B is 0.55, and the horizontal surface is frictionless. A= 100kg and B=10kg A is on the horizontal surface and B is attached to A.
Monday, October 3, 2011 at 6:20pm by Kayla

Physics
What force must be exerted on block A in order for block b not to fall. The coefficient of static friction between block A and B is 0.55, and the horizontal surface is frictionless. A= 100kg and B=10kg A is on the horizontal surface and B is attached to A.
Monday, October 3, 2011 at 6:57pm by Kayla

Physics
A block of mass 3.42 kg is drawn at constant speed a distance of 1.32 m along a horizontal floor by a rope exerting a constant force of magnitude 8.62 N and making an angle of 17.0 degrees above the horizontal. Compute the coefficient of friction between the block and the floor.
Thursday, April 18, 2013 at 9:50pm by CPhy

Physics
A block of mass 3.42 kg is drawn at constant speed a distance of 1.32 m along a horizontal floor by a rope exerting a constant force of magnitude 8.62 N and making an angle of 17.0 degrees above the horizontal. Compute the coefficient of friction between the block and the floor.
Thursday, April 18, 2013 at 9:50pm by CPhy

collage physics
a block of wood rest on a plane incline at 35 degrees to the horizontal.if the coefficient of the static friction between the surface is 0.45.determine: a) what is the horizontal force that must be applied to the block to initiate motion up the plane b)the horizontal force ...
Tuesday, November 30, 2010 at 11:06pm by troy

physic
Part 1 A 3.0 kg block is pushed 3.0 m at a constant velocity up a vertical wall by a constant force applied at an angle of 30.0 ◦ with the horizontal, as shown in the figure. The acceleration of gravity is 9.81 m/s2. If the coefficient of kinetic friction ...
Friday, February 25, 2011 at 7:51pm by ally

physics
A 2.00 kg block, on a horizontal surface with coefficient of static friction 0.900, is pushed by a force that is directed down at an angle of 30.0 degrees to the horizontal. Find the minimum magnitude of the force needed to get the block to start moving. so I found my N force ...
Friday, November 19, 2010 at 5:29pm by Trace

Physics
A 235-g block is pressed against a spring of force constant 1.55 kN/m until the block compresses the spring 10.0 cm. The spring rests at the bottom of a ramp inclined at 60.0 to the horizontal. Using energy considerations, determine how far up the incline the block moves from...
Tuesday, November 8, 2011 at 10:44pm by marvin

Physics
A 235-g block is pressed against a spring of force constant 1.55 kN/m until the block compresses the spring 10.0 cm. The spring rests at the bottom of a ramp inclined at 60.0 to the horizontal. Using energy considerations, determine how far up the incline the block moves from...
Tuesday, November 8, 2011 at 11:00pm by marvin

Physics
A 4 kg block resting on a horizontal surface is attached to an 8 kg block that hangs freely by a cord passing over a frictionless pulley. The coefficient of kinetic friction between the block and the horizontal surface is 0.4. Find the acceleration of the blocks and the ...
Saturday, November 18, 2006 at 5:07pm by Vv

Physics
A block of mass m is projected at speed Vo up a rough plane inclined at an angle theta to the horizontal. Model the block as a particle and assume that the frictional force acting is given by kv^2, where v is the block's speed and k is a constant. What is the block's equation ...
Sunday, May 13, 2012 at 10:52pm by Anonymous

Physics
Problem 3- A block of mass m1 = 4 kg moves from rest under the influence of a varying force F(x) = 4x + 38, where F is in newton and x is in meters, on a rough horizontal surface having a coefficient of kinetic friction of 0.2. The block is connected by a light cord passing ...
Sunday, December 1, 2013 at 11:36pm by Mariam

Physics
A 10 kg block is pushed across a rough surface by a 25N force the block moves at a constant velocity when this force is applied. A) determine the magnitude of the friction force acting on the block B) What is the coefficient of friction between the surface and the block
Monday, July 18, 2011 at 12:51am by Edward

physics
A metal block of mass 5kg lies on a rough horizontal platform.If a horizontal force of 8N applied to the block through its centre of mass just slides the block on the platform,then the coefficient of limiting friction between the block and the platform is
Sunday, February 24, 2013 at 12:18pm by Kenny

college phsyics
You push your physics book 1.50 m along a horizontal tabletop with a horizontal force of 2.40N. The opposing force of friction is 0.60N. a) how much work does your 2.40N force do on the book? b) what is the work done on the book by the friction force? c) what is the total work...
Friday, February 12, 2010 at 7:18am by frances

Physics
A 40kg block is pushed along a level surface with a 200 N force at an angle of 35 degrees below the horizon. The coefficient of kinetic friction between the block and the surface is 0.15. What is the normal force acting on the block? What is the force of friction? What is the ...
Sunday, February 5, 2012 at 1:02pm by Krystal

PHYSICS !!
A 45.0g bullet is fired on a 2.0kg wooden block which is resting on a horizontal surface with a coefficient friction of 0.4 . If the speed of the bullet is 165m/s when it hits the block. Determine the maximum horizontal distance of the block will reach
Wednesday, February 26, 2014 at 8:09am by gie

Physics
Sally applies a horizontal force of 500 N with a rope to dtag a wooden crate across a floor with a constant speed. The rope tied to the crate is pulled at an angle of 67.5 degrees. a) How much force is exerted by the rope on the crate? b) What work is done by Sally if the ...
Wednesday, November 14, 2007 at 11:34pm by Elizabeth

Physics
A block is sitting on a ramp. The block feels a force of friction sufficient to keep it from sliding down the ramp, which makes an angle of 30 degrees w.r.t. horizontal. What is the minimum coefficient of static friction between the block & ramp?
Monday, February 21, 2011 at 3:48pm by Paige

operating system
Problem 3- A block of mass m1 = 4 kg moves from rest under the influence of a varying force F(x) = 4x + 38, where F is in newton and x is in meters, on a rough horizontal surface having a coefficient of kinetic friction of 0.2. The block is connected by a light cord passing ...
Tuesday, December 3, 2013 at 11:04am by Anonymous

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 force of 50 N directed 30 degrees above the hoizontal is applied to a 10-kg block at rest on a rough horizontal surface. What is the coefficient of kinetic friction between the block and the horizontal surface if the acceleration of the block is 2.0 m/s2?
Monday, November 22, 2010 at 7:34pm by Heather

PHYSICS PLEASE HELP!!!
Please someone have mercy this is a test grade and I have no idea what to do ! A force of 200 N is being exerted on a blocki, which has a mass of 10 kg and is on 30 degrees inclined plane. The force is acting up the plane and parallel to it. The coefficient of friction between...
Monday, November 22, 2010 at 7:53pm by Tyler

physics
A block of mass m = 4 kg slides along a horizontal table when it encounters the free end of a horizontal spring of spring constant k = 14 N/m. The spring is initially on its equilibrium state, defined when its free end is at x=0 . Right before the collision, the block is ...
Tuesday, October 15, 2013 at 1:38pm by ss01

physics
The 2 kg block in Figure 7-25 slides down a frictionless curved ramp, starting from rest at a height of h = 3 m. The block then slides d = 12 m on a rough horizontal surface before coming to rest. Figure 7-25 (a) What is the speed of the block at the bottom of the ramp? (b) ...
Sunday, January 30, 2011 at 6:09pm by Sierra

physics
A block of weight w = 35.0 N sits on a frictionless inclined plane, which makes an angle theta = 27.0 degrees with respect to the horizontal. A force of magnitude F = 15.9 N, applied parallel to the incline, is just sufficient to pull the block up the plane at constant speed. ...
Friday, February 26, 2010 at 9:43am by Anonymous

physics
if the weight of the block,W,is 2.5 kilogram,the coefficient of static friction,0.25,and the coefficient of kinetic friction,0.15,determine: (a) the force necessary to hold the block sliding down (b) the force necessary to pull the block up the plane with uniform speed
Wednesday, March 6, 2013 at 9:21am by helpppp meeeeeeee PHYSICS.........................

Physics
A horizontal force of magnitude 30.0 N pushes a block of mass 3.85 kg a distance of 3.00 m across a floor, where the coefficient of kinetic friction is 0.600 a.)How much work is done by that applied force on the block-floor system? b.)During that displacement, the thermal ...
Tuesday, November 30, 2010 at 10:03pm by Sam

Physics
A 3 kg block is being pulled by a string at a constant speed on a surface with a coefficient of kinetic friction of 0.3. If the string is at an angle of 30 degrees with the horizontal, what is the magnitude of the force necessary to pull the block?
Thursday, June 30, 2011 at 11:18am by Megan

physics
a 2kg block of wood rests on a long table top. a 5 gram bullet moving horizontally with speed of 150m/s is shoot into the block and stricks in it then block slides 270cm along the table and stops. find a)speed of block after impact b)friction force between block and table.
Sunday, February 19, 2012 at 4:39am by yonas

Physics
A 2.1 kg block slides with a speed of 1.1 m/s on a frictionless, horizontal surface until it encounters a spring. (a) If the block compresses the spring 5.7 cm before coming to rest, what is the force constant of the spring? (b) What initial speed should the block have to ...
Monday, March 29, 2010 at 8:12pm by Carden

physics
A 1.50-kg block slides on a rough, horizontal surface. The block hits a spring with a speed of 2.07 m/s and compresses it a distance of 12.2 cm before coming to rest. If the coefficient of kinetic friction between the block and the surface is μk = 0.577, what is the force...
Wednesday, October 24, 2012 at 11:31am by kay

Physics
A 1.70-kg block slides on a rough, horizontal surface. The block hits a spring with a speed of 2.00 m/s and compresses it a distance of 11.3 cm before coming to rest. If the coefficient of kinetic friction between the block and the surface is μk = 0.534, what is the ...
Friday, October 26, 2012 at 10:28pm by Na

physics
A Block has a mass of 50.0 kilograms. the coefficient of static friction between the block and the level floor on which it rests is 0.428 A horizontal force of 618 newtons is applied to the block to the right, as shown. will the block move?
Thursday, May 24, 2012 at 1:30pm by Jen

Physics
A bullet with a mass m=12.5 g and speed v=85.4 m/s is fired into a wooden block with M=113 g which is initially at rest on a horizontal surface. The bullet is embedded into the block. The block-bullet combination slides across the surface for a distance d before stopping due ...
Thursday, October 25, 2012 at 6:45pm by Devin

PHYSICS HELP ASAP
a 3 kg block slides down a frictionless plane inclined 20 degrees to the horizontal. If the length of the plane's surface is 1.50m, how much work is done, and by what force? suppose the coefficient of kinetic friction between the block and the plane. What would be the net work...
Monday, January 10, 2011 at 5:32pm by mandy

Physics
A force of 50 N accelerates a 5.0 kg block at 6.0 m/s2 along a horizontal surface. (a) What is the frictional force acting on the block? (b) What is the coefficient of friction?
Sunday, October 21, 2012 at 1:31pm by HanuPhysics

Physics
A 3.0 kg block is being pulled with a horizontal force of 29.7 N. If the block is accelerating at 3.2 m/s/s, what is the coefficient of kinetic friction between the block and the table?
Tuesday, November 2, 2010 at 6:54pm by keith

physics. please help!
A 2.5 kg block is pulled to the right by a horizontal string. The coefficient of static friction between the block and the floor is 0.30 and the coefficient of kinetic friction is 0.20. What value of force applied by the string will start the block moving?
Sunday, October 31, 2010 at 7:44pm by caroline

physics
a 2.00 kg block is attached to a spring of force constant 500 N/m. The block is pulled 5.00 cm to the right of equilibrium and released from rest. Find the speed of the block as it passes through equilibrium if a) the horizontal surface is frictionless and b) the coefficient ...
Wednesday, March 7, 2007 at 8:49pm by Jean

science
The acceleration is negative since the surface is horizontal and friction is the only horizontal force acting. Compute the friction force from F = m a That gives F = 0.73 Newtons There is another way to compute the friction force, and it gives a different result. F = (kinetic ...
Tuesday, November 24, 2009 at 10:33am by drwls

physical
A 0.8 kg block of wood has an initial velocity of 0.25 m/s as it begins to slide across a table. The block comes to rest over a distance of 0.72m. a) what is the average frictional force on the block? b)How much work is done on the block by friction? c)How much work is done on...
Friday, August 17, 2012 at 8:34pm by sara

Physics
What force must be exerted on block A in order for block b not to fall. The coefficient of static friction between block A and B is 0.55, and the horizontal surface is frictionless.
Monday, October 3, 2011 at 1:03pm by Kayla

physics
A 2.0kg block is sitting on a 15 degree incline. The coefficient of friction is 0.22. What is the minimum force needed to cause the block to accelerate UP the slope? The force applied has to be slightly greater than the force of friction (mu(mgCosTheta)) plus the component of ...
Wednesday, September 13, 2006 at 7:51pm by mclanee

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...
Wednesday, October 6, 2010 at 11:56pm by christine

Physics
A 60 kg block slides along the top of a 100 kg block with an acceleration of 3.0 m/s2 when a horizontal force F of 320 N is applied. The 100 kg block sits on a horizontal frictionless surface, but there is friction between the two blocks. (a) Find the coefficient of kinetic ...
Wednesday, October 12, 2011 at 5:43pm by Henry

Physics
Is the 0.540mg 0.540 milligrams or 0.54m * g? I will assume the latter. For case (a), the maximum possible static friction force is Fs = (m*g cos16* - 0.54m*g sin16)*Us = 0.487 m g The horizontal component of applied force is 0.540m*g*cos 16 = 0.519 m*g. Since this exceeds the...
Wednesday, March 3, 2010 at 1:26am by drwls

physics
a block moves up 45degree incline w/ constant speed under the action of a force of 15n applied parallel to the incline.If the coefficient of kinetic friction is 0.3, determine the weight of the block and minimum force required to allow the block to move down the incline at ...
Thursday, March 6, 2014 at 9:41am by kmae

Physics Urgent please help
A block of mass m = 4 kg slides along a horizontal table when it encounters the free end of a horizontal spring of spring constant k = 14 N/m. The spring is initially on its equilibrium state, defined when its free end is at x=0 . Right before the collision, the block is ...
Saturday, October 12, 2013 at 4:11am by ss01

physics
The coefficient of static friction between a block and a horizontal floor is 0.37, while the coefficient of kinetic friction is 0.10. The mass of the block is 3.8 kg and it is initially at rest. Once the block is sliding, if you keep pushing on it with the same minimum ...
Sunday, November 21, 2010 at 12:37pm by anonymous


A 3.5 kg block, initially in motion, is pushed along a horizontal floor by a force F of magnitude 17 N at an angle θ = 35 with the horizontal (Figure 6-20). The coefficient of kinetic friction between the block and floor is 0.25. (Assume the positive direction is to the ...
Wednesday, July 14, 2010 at 3:56pm by Sam

Physics
You push your couch a distance of 3.8 m across the living room floor with a horizontal force of 180.0 N. The force of friction is 136.0 N. What is the work done by you, by the friction force, by gravity, and by the net force? you 1 friction force 2 gravity 3 net force 4
Tuesday, September 21, 2010 at 1:13pm by Gina

physics
A 2.0-N force acts horizontally on a 10-N block that is initially at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.50. What is the magnitude of the frictional force that acts on the block
Wednesday, September 21, 2011 at 9:41pm by kelly

Physics
A block of mass m lies on a rough plane which is inclined at an angle to the horizontal. The coefficient of static friction between the block and the plane is . A force of magnitude P is now applied to the block in a horizontal direction, towards the plane. Show that the ...
Sunday, May 13, 2012 at 12:15am by Anonymous

physics
A 3.5 kg block, initially in motion, is pushed along a horizontal floor by a force F of magnitude 17 N at an angle θ = 35 with the horizontal (Figure 6-20). The coefficient of kinetic friction between the block and floor is 0.25. (Assume the positive direction is to the ...
Wednesday, July 14, 2010 at 3:56pm by Sam

Physics.
A block of mass 3m is placed on a frictionless horizontal surface, and a second block of mass m is placed on top of the first block. The surfaces of the blocks are rough. A constant force of magnitude F is applied to the first block. a) Identify the horizontal force that ...
Tuesday, October 16, 2012 at 3:17pm by Kelsey

physics
A force of magnitude 25Nis directed at an angle of 37 deg above the horizontal moves a 10 Kg block along a horizontal surface at a constant velocity .How much work is done by this force in moaing the block a distance of 15m?
Friday, July 16, 2010 at 2:53pm by john

physics
A force of 8.7 N is applied to a steel block initally at rest on a horizontal frictionless surface. The force, which is directed at an angle of 30.0o below the horizontal, gives the block a horizontal acceleration of 5.3 m/s2. a) Draw a free body diagram and sum forces. b) ...
Thursday, October 6, 2011 at 10:20pm by Kayla L

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