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April 19, 2014

Search: kinetic friction

Number of results: 11,291

Physics
A 2.3 kg steel block is at rest on a steel table. A horizontal string pulls on the block. The coefficient of static friction for steel on steel is 0.80 (page 163) while the coefficient of kinetic friction is 0.60 while the acceleration due to gravity is 9.80 m/s2. If the ...
Monday, October 10, 2011 at 6:51pm by Me

physics
If the kinetic friction coeffient is 0.1, the force that is opposig motion is (F = 0.1 * M g). (a) The deceleration rate is therefore a = F/M = 0.1 g = 0.98 m/s^2 (b) The time to come to rest, T, is given by a T = 7.6 m/s. Solve for T
Friday, November 23, 2007 at 8:00pm by drwls

physics
What is the acceleration of the system if both blocks have a mass of 5.0 kg, and the coefficient of kinetic friction is 0.11? [___/4] (b) Determine the tension in the rope.
Friday, March 5, 2010 at 7:35pm by sylvia

physics
mass = 46 kg, angle 20 degrees, tension 240 newton , coefficient of kinetic friction = 0.5 find acceleration of the object
Monday, May 24, 2010 at 3:02am by Anonymous

physics
Find the horizontal distance the skier travels before coming to rest if the incline also has a coefficient of kinetic friction equal to 0.228
Saturday, February 19, 2011 at 8:26pm by Anonymous

PHSC
Four times as far, 60 m. The mass does not matter. The kinetic energy was increased by a factor of 4. The skidding friction force stays the same.
Wednesday, July 20, 2011 at 2:51pm by drwls

physics
I will have to assume the height is in meters and the friction work is in Joules. Don't be sloppy by omitting units. Her kinetic energy will be (M*V^2)/2 = M g H - 1.09*10^4 J You know M, g and H. Solve for V
Wednesday, December 14, 2011 at 6:18pm by drwls

physics
A 68.0 kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.770 and 0.470, respectively.
Thursday, February 16, 2012 at 6:25pm by cody

physics
Qualitatively explain how you would expect the kinetic energy to change as a glider slides down an inclined air track, where friction is negligible.
Thursday, April 5, 2012 at 12:52am by Kristina

Physics
(Friction force)*(braking distance) = K.E. reduction Solve for the final kinetic energy and get the final V from that.
Sunday, November 6, 2011 at 5:24pm by drwls

Physics
Well if you multiply the static and the kinetic friction and add gravity to it you get the minimum magnitude. PhD in Physics
Saturday, October 1, 2011 at 11:01am by Steven

physics
Subtract the kinetic energy gain from the potential energy loss. The remainder is friction work
Sunday, December 11, 2011 at 8:23pm by drwls

physics- MC QUESTIONS
Easy, The force you push with is less than the force of kinetic friction.
Thursday, May 3, 2012 at 11:57pm by David Cunningham

physics
8)If an airplane is moving at a constant velocity of 400 m/s for 20 s, what is its acceleration during this period? 0 m/s^2 b/c no change 10)You try to move a couch across the floor but it doesn't move. What is the other force acting on the couch? Static friction 11)You ...
Monday, March 31, 2008 at 5:27pm by Jon

Physics (dynamics)
A 47.0 kg slab rests on a frictionless floor. A 18.0 kg block rests on top of the slab. The static coefficient of friction between the block and the slab is 0.50, while the kinetic coefficient of friction is 0.40. The top block is acted upon by a force of 120 N. What is the ...
Saturday, March 10, 2012 at 9:41pm by Andrew

physics
Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string, as shown in Figure P5.64. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is k = 0.25. Determine the change in the...
Thursday, March 3, 2011 at 1:22am by megan

physics
A 3.39 kg block is placed on top of a 11.8 kg block. A horizontal force of F = 61.3 N is applied to the 11.8 kg block, and the 3.39 kg block is tied to the wall. The coefficient of kinetic friction between all moving surfaces is 0.112. There is friction both between the ...
Thursday, October 4, 2012 at 9:50pm by Anonymous

physics
A 3.39 kg block is placed on top of a 11.8 kg block. A horizontal force of F = 61.3 N is applied to the 11.8 kg block, and the 3.39 kg block is tied to the wall. The coefficient of kinetic friction between all moving surfaces is 0.112. There is friction both between the ...
Thursday, October 4, 2012 at 9:53pm by Anonymous

Physics
Problem 3- A 12 kg stone slides down a snow-covered hill, leaving point A with a speed of 10 m/s . There is no friction on the hill between points A and B, but there is friction on the level ground at the bottom of the hill, between B and the wall. After entering the rough ...
Thursday, December 12, 2013 at 4:58am by Anonymous

physics
In the figure below, m1 = 10.0 kg and m2 = 4.5 kg. The coefficient of static friction between m1 and the horizontal surface is 0.60, and the coefficient of kinetic friction is 0.30. m1 is on a table connected to m2 by a string that is on a pulley. m2 is hanging off the table ...
Wednesday, September 28, 2011 at 5:34pm by Dan

phy
When you push a 1.82-{\rm kg} book resting on a tabletop, it takes 2.21 N to start the book sliding. Once it is sliding, however, it takes only 1.52 N to keep the book moving with constant speed. 1-What is the coefficient of static friction between the book and the tabletop? 2...
Monday, July 18, 2011 at 7:28pm by pop

Physics
A book whose mass is 3 kg is projected up a long 40 degree incline with an initial speed of 25 m/s The coefficient of kinetic friction between the book and the Mane is 0.20. a. Find the magnitude of the friction force acting on the book as it moves up the plane. b. For how ...
Sunday, November 19, 2006 at 8:14pm by QT

physics
A dockworker loading crates on a ship finds that a 21-kg crate, initially at rest on a horizontal surface, requires a 70-N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 51 N is required to keep it moving with a constant ...
Sunday, September 30, 2012 at 9:18pm by Anonymous

physics
A dockworker loading crates on a ship finds that a 21-kg crate, initially at rest on a horizontal surface, requires a 70-N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 51 N is required to keep it moving with a constant ...
Tuesday, October 2, 2012 at 6:03pm by monic

physics
A 280 kg piano slides 4.3 m down a 30 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40. Calculate: (a) the force exerted by the man, (b) the work done by the man on the ...
Wednesday, October 7, 2009 at 9:43am by pauleen

physical
a crate rest on a ramp that makes an angle of tangent with the horizontal.the coefficient of kinetic friction is 0.35 and the coefficient of static friction is 0.45.the inclination of the ramp is slowly increased.(a)find the angle at which the crate starts to slip down the ...
Thursday, September 6, 2012 at 9:08am by kim

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 - Verification
A skier (75 kg) goes down a 15* slope. The coefficient of kinetic friction between the skis and the snow is 0.185. The length of the slope is of 500m. a) What is the work done by gravity? Answer) Wmg = mgd = 75kg(9.8N/kg)500m(sin15) = 354 977 J Is it cos or sin? And is Work ...
Monday, February 6, 2012 at 7:40pm by Raf

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 17 kg block is dragged over a rough, hor- izontal surface by a constant force of 170 N acting at an angle of angle 32.1◦ above the horizontal. The block is displaced 33.9 m, and the coefficient of kinetic friction is 0.199. a] find the work done by 170N b] find the ...
Sunday, November 14, 2010 at 7:34pm by mary

Physics
When you push a 1.82-kg book resting on a tabletop, it takes 2.30 N to start the book sliding. Once it is sliding, however, it takes only 1.46 N to keep the book moving with constant speed. Q1. What is the coefficient of static friction between the book and the tabletop? Q2. ...
Monday, March 7, 2011 at 1:04am by Randy

physics
Force x distance = work done against friction = initial kinetic energy Solve for the force F = (1/2) M Vo^2/X
Wednesday, November 18, 2009 at 9:08am by drwls

physics
W(g)=W(a)+kinetic energy If at terminalvelocity during that 600 meters, the then work done gravity=work done gy friction
Wednesday, July 20, 2011 at 12:29pm by bobpursley

Physics
A 1000N crate is being pushed across a level floor at a constant speed by a force F of 300N at an angle of 20.0 degrees. (a) What is the coefficient of kinetic friction between the crate and the floor? (b) If the 300-N force is instead pulling the block at an angle of 20.0 ...
Thursday, November 14, 2013 at 6:39pm by DROSP

Physics
A 1000N crate is being pushed across a level floor at a constant speed by a force F of 300N at an angle of 20.0 degrees. (a) What is the coefficient of kinetic friction between the crate and the floor? (b) If the 300-N force is instead pulling the block at an angle of 20.0 ...
Friday, November 15, 2013 at 7:15pm by DROSP

Physics
I agree, something is missing. The formula is correct if you knew the force, F. In this case, the force is not know, but you can calculate the average force from energy considerations. Work done by friction = F*D = 8.5F using g=9.8 m/s², kinetic energy before hitting the ...
Thursday, October 22, 2009 at 5:33pm by MathMate

10th grade
A sledge loaded with bricks has a total mass of 18.0 kg nd is plled at constant speed of a rope incllined at 20 degres above the horizontal. The sledge moves a distance of 20.0 m on a horizontal surface. the coefficient of kinetic friction between the sledge and surface is 0....
Saturday, November 27, 2010 at 2:27am by dom

physics
A professor drives off with his car (mass 840 kg), but forgot to take his coffee mug (mass 0.37 kg) off the roof. The coefficient of static friction between the mug and the roof is 0.7, and the coefficient of kinetic friction is 0.4. What is the maximum acceleration of the car...
Saturday, January 28, 2012 at 9:03pm by Rachel

physics
A professor drives off with his car (mass 840 kg), but forgot to take his coffee mug (mass 0.37 kg) off the roof. The coefficient of static friction between the mug and the roof is 0.7, and the coefficient of kinetic friction is 0.4. What is the maximum acceleration of the car...
Saturday, January 28, 2012 at 9:04pm by Rachel

physics
A professor drives off with his car (mass 800 kg), but forgot to take his coffee mug (mass 0.35 kg) off the roof. The coefficient of static friction between the mug and the roof is 1.1, and the coefficient of kinetic friction is 0.5. What is the maximum acceleration of the car...
Thursday, February 23, 2012 at 7:06pm by Luke

physics
A professor drives off with his car (mass 850 kg), but forgot to take his coffee mug (mass 0.39 kg) off the roof. The coefficient of static friction between the mug and the roof is 0.7, and the coefficient of kinetic friction is 0.4. What is the maximum acceleration of the ...
Saturday, February 22, 2014 at 11:49am by josh

Science
The roller coaster has its highest speed (and kinetic energy) where the gpe is lowest, and vice versa. The sum of the two remains constant (neglecting friction)
Thursday, April 23, 2009 at 2:10am by drwls

physics
well coeficcent are the numbers with variables close to it.kinetic friction is the moving of the object.so how many kg are in 25 newtons.so what is the 0.90 m to the 1.60 m. so with that wha do you think the answer is?
Sunday, September 27, 2009 at 2:15pm by Chidera

Science
if it takes 20 newtons to accelerate an object weighing 15 kg 0.1 meters per second squared to the west what is the force of kinetic friction?
Thursday, November 25, 2010 at 8:50pm by Abby

Physics
(1/2)MVmax^2 = M g H Cancel out the M's and solve for H. (This neglects friction and extra rotational kinetic energy of the wheels. It will give you an approximate answer that is an upper bound)
Sunday, February 27, 2011 at 6:17pm by drwls

physics
If the coefficient of kinetic friction between tires and dry pavement is 0.800, what is the shortest distance in which an automobile can be stopped by locking the brakes when traveling at 25.7 ?
Saturday, February 25, 2012 at 9:36pm by Jack

Physics
If the coefficient of kinetic friction is 0.25, how much work do you do when you slide a 45 kg box at constant speed across a 5.8m -wide room?
Thursday, May 30, 2013 at 8:28am by James

Physics
Starting from rest, a 11.50 kg suitcase slides 3.18 m down a frictionless ramp inclined at 40 from the floor. The suitcase then slides an additional 5.22 m along the floor before coming to a stop. (a) Determine the suitcase's speed at the bottom of the ramp. (b) Determine the...
Sunday, October 14, 2012 at 12:40pm by Angela

physics
Once sliding begins, there is a friction force equal to f = (M+m)*g*0.22 = 22.7 N The initial speed V' of the block-with-bullet, after impact is given by the law of conservation of momentum: m*750 = (M+m)V V' = (.0105/10.51)*750 = 0.75 m/s As a last step, equate the kinetic ...
Wednesday, March 10, 2010 at 2:27pm by drwls

Physics
Any help pleeeze!! I'm totally lost on these!! 1. A 14 g coin slides upward on a surface that is inclined at an angle of 16 above the horizontal. The coefficient of kinetic friction between the coin and the surface is 0.23; the coefficient of static friction is 0.31. Find the...
Sunday, May 20, 2007 at 11:03am by L.A.

physics
Frictional force, F = μmg cos(θ) Work done to overcome kinetic friction = F*D = 8.4F Difference in elevation, H = 8.4 sin(&theta)+2.8 m Energy left (in the form of KE) = mgH-8.4F Equate Kinetic energy with potential energy (1/2)mv² = mgH-8.4(μmg cos(θ)) ...
Saturday, October 31, 2009 at 2:46pm by MathMate

College physics
weight-friction=mass*a 40g-friction= 40 a solve for friction.
Thursday, February 4, 2010 at 5:05pm by bobpursley

science
1a) The equation you will need to solve this problem is F = ma. The "F" part of the equation is the net force, which is the sum of the force applied by the donkey (F1), the weight component up the hill (F2) and the friction force (F3). F = F1 - F2 - F3 = m a = 100 kg*0.2 m/s^2...
Wednesday, May 5, 2010 at 3:39am by drwls

physics
A 11.0 box is released on a 37 incline and accelerates down the incline at 0.25 .What is the coefficient of kinetic friction?
Friday, October 15, 2010 at 8:29pm by Anne

physics
if the kinetic friction on a sliding box (9.5kg) of books was 23.5,what was the total force exerted to slide the box
Tuesday, October 9, 2012 at 5:29pm by Anonymous

physics
loss of potential energy = m g h gain of kinetic energy = (1/2)m v^2 difference = work against friction which = F * 53 neters
Friday, February 21, 2014 at 1:15pm by Damon

Physics
Not sure what speed is safe, because we do not control what clothing riders wear, and hence their coefficient of friction. According to the data, assuming them to be accurate, you will need to have the friction to overcome the weight of the customers. Minimum coefficient of ...
Monday, October 12, 2009 at 2:27am by MathMate

Physics
In moving a 35.0 kg desk from one side of a classroom to the other, a professor finds that a horizontal force of 300 N is necessary to set the desk in motion, and a force of 185 N is necessary to keep it in motion at a constant speed. (a) What is the coefficient of static ...
Monday, September 20, 2010 at 2:09am by George

Physics
What made you think it is the third option? Did you do some calculations to justify this? For the time being, ignore the static friction, assuming as you said, the refrigerator is already moving. The normal reaction, N, on the carpet is mg. The minimum force, F, to keep the ...
Saturday, October 31, 2009 at 3:32pm by MathMate

Physics
A worker pushes a 1500 N crate with a horizontal force of 345 N a distance of 24 m. Assume the coefficient of kinetic friction between the crate and the floor is .220. How much work is done by the floor on the crate? -M*g*(mu,k)*X Mg = 1500 N mu,k = 0.220 X = 24 m It is ...
Tuesday, February 27, 2007 at 5:58pm by Mischa

Physics
A 60.5-kg person, running horizontally with a velocity of +3.76 m/s, jumps onto a 10.4-kg sled that is initially at rest. (a) Ignoring the effects of friction during the collision, find the velocity of the sled and person as they move away. m/s (b) The sled and person coast 30...
Sunday, October 24, 2010 at 4:49pm by Xavier

Physics
A 300 kg piano slides 4.4 m down a 30 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40. (a) Calculate the magnitude of the force exerted by the man. (b) Calculate the work ...
Friday, March 21, 2014 at 9:05pm by Hope

Physics
A 300 kg piano slides 4.4 m down a 30 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40.(a) Calculate the magnitude of the force exerted by the man.(b) Calculate the work ...
Friday, March 21, 2014 at 9:17pm by Hope

Physics
A block with mass m1 on a plane inclined at angle  to the horizontal is connected to a second hanging block with mass m2 by a cord passing over a small, frictionless pulley, as shown. The coefficient of static friction is us and the coefficient of kinetic friction is ...
Saturday, April 14, 2012 at 5:32pm by modjadji

physics
Well, I am not going to do it for you but will give some thoughts. Approach it with energy reasoning. The frisbee had kinetic energy when it hit the roof, (1/2) m v^2 It lost kinetic energy to potential climbing m g (10 sin 35.5) It lost kinetic energy due to work done against...
Thursday, February 24, 2011 at 9:42am by Damon

Physics
A 24.5N brick slides from rest down an 11.2m, 53.0 degree ramp with a meu=0.45. At the bottom, it strikes a stationary 36.8N brick, and then the two slide on together. How far will the two slide on a level surface with a coefficient of friction of 0.080? This problem must be ...
Thursday, June 14, 2007 at 2:04am by Lisa

physics
A slide-loving pig slides down a certain 35 degree slide in twice the time it would take to slide down a frictionless 35 degree slide. What is the coefficient of kinetice friction between the pig and the slide? I know that when the coefficent of kinetic fricition is zero t=1/2...
Monday, November 27, 2006 at 3:29pm by Bri

physics
Part B Piles of snow on slippery roofs can become dangerous projectiles as they melt. Consider a chunk of snow at the ridge of a roof with a pitch of 21. As the snow begins to melt, the coefficient of static friction decreases and the snow eventually slips. Assuming that the ...
Friday, October 15, 2010 at 9:22pm by Anne

Physics
Two people push on a box that has a mass of 10kg, the person on the right has a mass of 86kg and applies a horizontal force of 50N. The person on the left has a mass of 45kg. The coefficient of kinetic friction between the box and the floor is .2, the coefficient of static ...
Sunday, November 25, 2012 at 4:58pm by Tim

Physics
Two people push on a box that has a mass of 10kg, the person on the right has a mass of 86kg and applies a horizontal force of 50N. The person on the left has a mass of 45kg. The coefficient of kinetic friction between the box and the floor is .2, the coefficient of static ...
Sunday, November 25, 2012 at 9:05pm by Tim

Physics-friction problem
A 0.170 kg hockey puck is initially moving at 21.2 m/s [W] along the ice. The coefficient of kinetic friction for the puck and the ice is 0.005. (a) What is the speed of the puck after traveling 58.5 m? my solution: Fnet=Fk ma=μk.Fn ma=μk.mg a=(0.05)(0.170kg)(9.8m/s2...
Monday, April 1, 2013 at 4:12pm by LG

Physics
Measuring coefficients of friction. A coin is placed near one edge of a book lying on a table, and that edge of the book is lifted until the coin just slips down the incline. The angle of the incline Theta C, called the critical angle, is measured. (a) Draw a free body diagram...
Sunday, September 27, 2009 at 2:02pm by Mandy

physics
You push a box along the floor against a constant force of friction. When you push with a horizontal force of 75 N the acceleration of the box is 0.55 m/s2; when you increase the force to 85 N the acceleration is 0.78 m/s2. (a) Find the mass of the box. kg (b) Find the ...
Saturday, February 13, 2010 at 7:23am by janie

Physics
You push a box along the floor against a constant force of friction. When you push with a horizontal force of 72 N the acceleration of the box is 0.43 m/s2; when you increase the force to 77 N the acceleration is 0.58 m/s2. (a) Find the mass of the box. (b) Find the ...
Monday, February 15, 2010 at 6:35pm by Bobby C

Physics
You push a box along the floor against a constant force of friction. When you push with a horizontal force of 78 N the acceleration of the box is 0.46 m/s2; when you increase the force to 86 N the acceleration is 0.76 m/s2. (a) Find the mass of the box. (b) Find the ...
Sunday, February 12, 2012 at 4:40pm by Anna

Physics
In the 1950s, an experimental train that had a mass of 2.65 104 kg was powered across a level track by a jet engine that produced a thrust of 5.25 105 N for a distance of 509 m. Assume that air resistance is negligible. (b) Find the change in kinetic energy. J____ (c) Find the...
Thursday, February 18, 2010 at 8:53pm by Dar

Physics
An block of mass , starting from rest, slides down an inclined plane of length and angle with respect to the horizontal. The coefficient of kinetic friction between the block and the inclined surface is . At the bottom of the incline, the block slides along a horizontal and ...
Thursday, October 10, 2013 at 7:44pm by sied

Physics
39 cos22.6*(1 meter) is the work done by the force, in joules. Subtract the final kinetic energy from that. That will be the work done against friction.
Wednesday, July 18, 2012 at 8:06pm by drwls

physic
Find the acceleration reached by each of the two objects shown in figure below if the coefficient of kinetic friction between the 7.00 kg object and the plane is 0.270.
Friday, October 16, 2009 at 4:42am by Chan

physics
A box is sliding down a ramp sloping 25 above the horizontal. The coefficient of kinetic friction is 0.15. What is the acceleration? The answer is 2.8 m/s^2. How can this be solved with out mass?
Monday, September 20, 2010 at 9:56am by Angela

physics
a bar is pushed so that it slides across the floor. how far will it go, given the coefficient of kinetic friction is 0.25, and the push imparts an initial speed of 2.5m/s?
Friday, April 20, 2012 at 6:45pm by krag

Physics
When friction is used to counteract centrifugal force, the side friction factor, f, between the tires and roadway is incorporated into the calculation for the superelevation angle. (the angle of road banking where friction is not needed) tan@=[(Vt)^2-(f)(r)g]/[(r)g+f(Vt)^2] (...
Tuesday, March 29, 2011 at 9:00pm by Matthew

physics help!!!
The minimum work required in the potential energy increase at the top of the ramp. you need the height of the ramp for that. That would be 460 sin 17.5 With friction, you need to add the work done against friction, which is (friction force) x 460 m. Use the coefficient of ...
Tuesday, November 17, 2009 at 10:00pm by drwls

dynamics
In the co-rotating frame, define an angular variable alpha such that the channel is at alpha = 0. You can enforce that the ball is at alpha = 0 using a Langrange multiplier, so you treat the alpha coordinate as a dynamic variable for the ball. The kinetic energy is: T = 1/2 m ...
Sunday, November 10, 2013 at 7:21pm by Count Iblis

physics
There are a couple of ways to do this. Netforce= ma 200N+friction=ma -200N + ma=friction solve for friction force. Work done on by friction=forcefricion(10m) Now notice
Tuesday, February 3, 2009 at 6:51pm by bobpursley

Physics
In attempting to pass the puck to a teammate, a hockey player gives it an initial speed of 2.0m/s, but because of the kinetic friction between the puck and the ice, the puck travels only half the distance between the players before coming to rest. Assuming that the ice's ...
Friday, December 4, 2009 at 2:46am by John

physics
A 1900 kg car moves along a horizontal road at speed v0 = 26.4 m/s. The road is wet, so the static friction coefficient between the tires and the road is only μs = 0.17 and the kinetic friction coefficient is even lower, μk = 0.119. The acceleration of gravity is 9.8...
Wednesday, December 18, 2013 at 4:23pm by RACHEL

physic
Hi! I try already but, the answer is wrong could you help me to fix it out. A sledge loaded with bricks has a total mass of 17.8 kg and is pulled at constant speed by a rope inclined at 20.8 above the horizontal. The sledge moves a distance of 20.6 m on a horizontal surface. ...
Tuesday, October 27, 2009 at 3:45am by Chan

Physics
5) You are pushing a 55 kg refrigerator along at a constant speed of 1.5 m/s using an applied force of 250 N when the floor type changes from tile to carpet. The carpet has a coefficient of static friction of 0.62 and a coefficient of kinetic friction of 0.54. Are you pushing ...
Saturday, October 31, 2009 at 3:32pm by Anonymous

physical
A block with mass m1 on a plane inclined at angle to the horizontal is connected to a second hanging block with mass m2 by a cord passing over a small, frictionless pulley, as shown. The coefficient of static friction is Us s and the coefficient of kinetic friction is Uk...
Thursday, April 5, 2012 at 6:19pm by Lebza

Physics
A sled weighing 60 N is pulled horizontally across snow so that the coefficient of kinetic friction between the sled and the snow is 0.100. A penguin weighing 70 N rides on the sled. If the coefficient of static friction between the penguin and the sled is 0.700, find the ...
Wednesday, December 6, 2006 at 10:39pm by Armando

physics
A mass m = 17.0 kg is pulled along a horizontal floor with NO friction for a distance d =5.1 m. Then the mass is pulled up an incline that makes an angle = 30.0 with the horizontal and has a coefficient of kinetic friction k = 0.34. The entire time the massless rope used ...
Thursday, October 18, 2012 at 4:31pm by mohamed

physics
Starting from rest, a 10.7 kg block slides 2.60 m down to the bottom of a frictionless ramp inclined 30.0 from the floor. The block then slides an additional 4.70 m along the floor before coming to a stop. (a) Determine the speed of the block at the bottom of the ramp. m/s (b...
Tuesday, March 26, 2013 at 7:12pm by Rob

another physics problem that i dont understnad..
The work done by the applied force is 95 x 5.2 = 494 J Part of the work was done overcoming the friction force. The friction force is Ff = 58*0.22*cos30 = 11.05 N and the work done against that force is 57.5 J The work done increasing the gravitational potential energy is: M*g...
Thursday, April 15, 2010 at 3:35pm by drwls

physics
A moving 2.8 kg block collides with a horizontal spring whose spring constant is 215 N/m (see figure). The block compresses the spring a maximum distance of 11.5 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal surface is 0.48...
Tuesday, November 23, 2010 at 10:02am by help

physics
Solve this equation for X: Initial kinetic energy = work done aqainst friction (1/2) M*Vo^2 = M*g *Uk * X M cancels out. Uk = 0.050
Friday, October 22, 2010 at 1:56am by drwls

physics
A 75kg box is being pulled across the floor with a force of 465N.If the kinetic coefficient of friction is 0.57,what is the acceleration of the box?
Saturday, December 10, 2011 at 6:42pm by Auriel

physics
A 75kg box is being pulled across the floor with a force of 465N.If the kinetic coefficient of friction is 0.57,what is the acceleration of the box?
Saturday, December 10, 2011 at 6:44pm by Auriel

Physics
True or False: If no friction forces are present the work done by a force on an object increases either its kinetic energy or its potential energy.
Tuesday, December 13, 2011 at 8:09pm by David

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