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April 24, 2014

Search: kinetic friction

Number of results: 7,784

Physics
In order to determine the coefficients of friction between rubber and various surfaces, a student uses a rubber eraser and an incline. In one experiment, the eraser begins to slip down the incline when the angle of inclination is 36.4 and then moves down the incline with ...
Tuesday, November 3, 2009 at 1:46am by Chloe

PHYSICS
Two objects are connected by a massless string as shown in the figure below. The pulley is massless and rotates without friction. The object of mass m = 1.7 kg slides without friction on an inclined plane which makes an angle of = 38 with the horizontal. The object of mass ...
Thursday, March 17, 2011 at 1:51pm by Tanya

9th grade -physical science
a the top of a hill a rollercoaster has 67,500j of kinetic energy and 290,000j of potential energy. gradually the roller coaster comes to a stop due to friction. if the roller coaster has 30,000j of potential energy when it stops, how much heat energy is generated by friction ...
Monday, May 3, 2010 at 4:32pm by robbie

Physics
When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1500 kg automobile traveling at 42 m/s comes to a halt after its brakes are applied, how much can the ...
Sunday, January 13, 2013 at 6:49pm by I'm going to die please help

physics
When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1280 kg automobile traveling at 30.8 m/s comes to a halt after its brakes are applied, how much can the ...
Thursday, March 14, 2013 at 6:56pm by Jayde Larson

physics
Suppose that a 200g mass (0.20kg) is oscillating at the end of a spring upon a horizontal surface that is essentially friction-free. The spring can be both stretched and compressed and have a spring constant of 240N/m. It was originally stretched a distance of 12cm (0.12m) ...
Tuesday, March 13, 2012 at 11:45pm by Kayla

Physics
A box is being pushed up the ramp by you at a 15 degree angle. The coefficient of kinetic friction between the box and ramp is .4. The box has a mass of 12 kg and you are pushing up the ramp with a force of 95N. What is the kinetic frictional force? What is the sum of forces (...
Wednesday, December 7, 2011 at 10:09pm by robert

Physics
A box of mass 250 kg slides 4.6 m down an inclined plane of 31. Jim pushes against the box to keep it from accelerating. The coefficient of kinetic friction between the box and the ramp is 0.41 (a) Calculate the magnitude of the force exerted by Jim. (b) Calculate the work ...
Thursday, March 8, 2012 at 9:11pm by Sarah

Physics
Could you explain these in a very easy term that I could understand, give the definitions of the 3 thing below Static Friction Dynamic Friction Rolling Friction
Wednesday, April 23, 2014 at 1:28pm by Olumide Adesiyan

physical
Problem 1 A goalkeeper kicks a ball of mass 400 g in the air, and reaches a position of height 15.9 m above the ground corresponding to a horizontal distance 19.7 m from its initial position. During its flight, the ball experiences a horizontal friction force of 3 N from a ...
Thursday, December 8, 2011 at 1:39am by sumi

physical
Problem 1 A goalkeeper kicks a ball of mass 400 g in the air, and reaches a position of height 15.9 m above the ground corresponding to a horizontal distance 19.7 m from its initial position. During its flight, the ball experiences a horizontal friction force of 3 N from a ...
Thursday, December 8, 2011 at 1:45am by sumi

physics
A person pulls with a force of 40 N on two boxes at rest. The top box is 3.0 kg and the bottom box is 6.0 kg. The coefficient of kinetic friction between the floor and the larger box is .20 and the angle is 30 degrees. a) if the smaller box doesn't slide on top of the larger ...
Wednesday, October 27, 2010 at 6:19pm by caroline

physics
A person pulls with a force of 40 N on two boxes at rest. The top box is 3.0 kg and the bottom box is 6.0 kg. The coefficient of kinetic friction between the floor and the larger box is .20 and the angle is 30 degrees. a) if the smaller box doesn't slide on top of the larger ...
Thursday, October 28, 2010 at 10:02am by caroline

Physics
A block of wood is pulled by a horizontal string across a horizontal surface at a constant velotcity with a force of 20 N. What is the coefficient of kinetic friction between the surfaces?
Wednesday, October 13, 2010 at 4:11pm by Kelsey

Physic
A block moves up an incline of 45 inches at constant speed, because the action of a force of 15 N parallel to the incline. If the coefficient of kinetic friction is 0.3. Determine the weight of the box.
Sunday, November 7, 2010 at 4:20pm by Luz

physics
determine the acceleration of a 25 kg crate being dragged across a floor by a 150 N force at a 42 degree angle above the floor where the kinetic coefficient of friction is .52.
Monday, April 23, 2012 at 9:54am by Syd

Physica
a man pushes a box of mass 5 kg in a horizontal direction by 10 N force on the surface through a distance of 5m if the cofficien of kinetic friction is 0.2 the total work done on the box is
Sunday, July 15, 2012 at 2:18am by Q19

Physica
a man pushes a box of mass 5 kg in a horizontal direction by 10 N force on the surface through a distance of 5m if the cofficien of kinetic friction is 0.2 the total work done on the box is
Monday, July 16, 2012 at 6:08am by 1919

Physica
a man pushes a box of mass 5 kg in a horizontal direction by 10 N force on the surface through a distance of 5m if the cofficien of kinetic friction is 0.2 the total work done on the box is
Tuesday, July 17, 2012 at 7:25am by 1999999

Physics
A light string, connects blocks 1 and 2 of masses m1 and m2. These blocks are further connected to a block of mass M by another light string that passes over a pulley of negligible mass and friction. Blocks 1 and 2 move with a constant velocity v down the inclined plane, which...
Thursday, December 9, 2010 at 10:07pm by Rahul

Thermodynamic Physics
When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1500 kg automobile traveling at 42 m/s comes to a halt after its brakes are applied, how much can the ...
Sunday, January 13, 2013 at 10:25pm by Kristal

phyiscs help please
A 3.00*10^2 N force is pulling an 80.0 kg refrigerator across a horizontal surface. The force acts at an angle of 18.0 above the surface. The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 8.00 m. (a) Find the work done by the pulling force...
Friday, October 29, 2010 at 10:37am by Anonymous

physics
You are trying to slide a refrigerator across a horizontal floor. The mass of the refrigerator is 199 kg, and you need to exert a force of 343 N to make it just begin to move. (a) What is the coefficient of static friction between the floor and the refrigerator? F=(mu)m*g 343\...
Thursday, September 9, 2010 at 2:30pm by bill

Physics
1.A 4.5kg object is at rest on a table with state friction of 0.56 and kinetic friction of 0.46. A force is applied such that the object just beings to move. If that same force is maintained, at what rate will the object accelerate? The answer is 0.98m/^2 2.A 2.0kg block is at...
Saturday, June 16, 2012 at 11:16pm by Need help

physics
Two blocks with mass m1 = 4.2 kg and m2 = 4.7 kg are connected by a massless string over a frictionless and massless pulley. The angle of the incline is equal to 27.5. The kinetic coefficient of friction between m1 and the incline is 0.28. What is the minimum value of the ...
Saturday, December 4, 2010 at 8:28pm by sky

physics
A moving 1.60 kg block collides with a horizontal spring whose spring constant is 295 N/m. The block compresses the spring a maximum distance of 3.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal surface is 0.500. What is ...
Thursday, February 28, 2008 at 9:58pm by rory

Physics
A moving 4.80 kg block collides with a horizontal spring whose spring constant is 243 N/m. The block compresses the spring a maximum distance of 5.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal surface is 0.390. What is ...
Wednesday, March 5, 2008 at 7:54am by Courtney

physics
A moving 3.20 kg block collides with a horizontal spring whose spring constant is 224 N/m. The block compresses the spring a maximum distance of 5.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal surface is 0.490. What is ...
Monday, December 30, 2013 at 4:59pm by Laura

Physics
A moving 3.20 kg block collides with a horizontal spring whose spring constant is 224 N/m. The block compresses the spring a maximum distance of 5.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal surface is 0.490. What is ...
Tuesday, December 31, 2013 at 11:36am by Laura

Physics
A moving 3.20 kg block collides with a horizontal spring whose spring constant is 224 N/m. The block compresses the spring a maximum distance of 5.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal surface is 0.490. What is ...
Wednesday, January 1, 2014 at 8:00pm by Laura

physics
A box of mass 52 kg starts from rest to slide down a ramp that makes an angle of 16.6 degrees with respect to the horizontal. 4.1 seconds later, it has covered a distance of 3.98 meters. What is the coefficient of kinetic friction?
Saturday, February 22, 2014 at 11:57am by Tammie

physics
A 10 kg crate is pulled up a rough incline with an initial speed of 1.5 m/s. The pulling force is 100 N parallel to the incline, which makes an angle of 20 degrees with the horizontal. If the coefficient of kinetic friction is .40 and the crate is pulled a distance of 5 m, (a...
Monday, October 22, 2007 at 11:15pm by Anonymous

physics
A 10 kg crate is pulled up a rough incline with an initial speed of 1.5 m/s. The pulling force is 100 N parallel to the incline, which makes an angle of 20 degrees with the horizontal. If the coefficient of kinetic friction is .40 and the crate is pulled a distance of 5 m, (a...
Tuesday, October 23, 2007 at 12:03am by Anonymous

Physics
A roller-coaster car with a mass of 650 kg starts at rest from a point 28 m above the ground. At point B, it is 14 m above the ground. [Express your answers in kilojoules (kJ).] (a) What is the initial potential energy of the car? 1 . kJ (b) What is the potential energy at ...
Monday, March 5, 2012 at 9:56pm by Sara

Classical Mechanics Physics
A block of mass m= 3 kg is initially at rest on a horizontal surface. At time t=0, we begin pushing on it with a horizontal force that varies with time as F(t)=βt2, where β= 1.2 N/s2. We stop pushing at time t1=5 s [F(t)=0 for t>t1]. (a) First, assume the surface ...
Friday, December 6, 2013 at 3:38pm by Anonymous

AP Physics
27. a)In the 1950s, an experimental train that had a mass of 32800 kg was powered across a level track by a jet engine that produced a thrust of 4.37 10^5 N for a distance of 465 m.Find the work done on the train. Answer in units of J. b)Find the change in kinetic energy. ...
Saturday, February 26, 2011 at 9:52pm by jeff

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
A 260 kg piano slides 4.1 m down a 30 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (Fig. 6-36). The effective coefficient of kinetic friction is 0.40. (a) Calculate the force exerted by the man. (b) Calculate the work done ...
Sunday, November 14, 2010 at 9:38pm by Joe

Physics
A 255 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 (Fig. 6-35). The effective coefficient of kinetic friction is 0.40. (a) Calculate the force exerted by the man. (b) Calculate the work done ...
Wednesday, March 2, 2011 at 10:07pm by Maria

Physics
A 255 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 (Fig. 6-35). The effective coefficient of kinetic friction is 0.40. (a) Calculate the force exerted by the man. (b) Calculate the work done ...
Wednesday, March 2, 2011 at 10:14pm by Maria

Physics
A 305 kg piano slides 4.0 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 force exerted by the man. (b) Calculate the work done by the man on...
Wednesday, March 23, 2011 at 10:06pm by Robert

Science (please check my answers)
7. During the process of photosynthesis, plants convert carbon dioxide and water into glucose. Covalent bonds hold the glucose molecules together. The breaking of the covalent bonds during digestion releases energy. The type of energy released is (1 point) kinetic energy. ...
Wednesday, February 5, 2014 at 11:38am by CCA

phy
A 290 kg piano slides 4.6 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 force exerted by the man. N (b) Calculate the work done by the man ...
Saturday, September 25, 2010 at 7:10pm by mas

Physics( Checking answer)
Sorry for re-posting but I really need to know if I did it right. Please someone help! Two 3.0g bullets are fired with speeds of 40.0 m/s and 80.0 m/s respectively. What are their kinetic energies? Which bullet has more kinetic energy? What is the ratio of their kinetic ...
Sunday, October 31, 2010 at 3:29pm by Cory

physics
a bus slams on brakes to avoid an acciden.the tread marks of the tires are 80 meter long. if coefficient of kinetic friction is 0.7, what was the speed before applying the brakes?
Saturday, October 2, 2010 at 2:36am by kristel

physics
a 20 N force pulls a 5kg box at a 60 degree angle above horizontal along the floor. If the Kinetic friction between contact surfaces is 2N. what is the acceleration of the box?
Wednesday, November 3, 2010 at 9:25pm by Meme

physics
a 20 N force pulls a 5kg box at a 60 degree angle above horizontal along the floor. If the Kinetic friction between contact surfaces is 2N. what is the acceleration of the box?
Wednesday, November 3, 2010 at 9:27pm by Meme

physics
A 290 kg piano slides 4.0 m down a 30 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (Fig. 6-36). The effective coefficient of kinetic friction is 0.40
Monday, March 21, 2011 at 10:08pm by md8

physics
7. Imagine that the coefficient of kinetic friction between a certain 15-kg box and the floor is 0.35. How hard would you have to push on it to move it at a constant speed of 2.6 m/s across the floor?
Friday, May 6, 2011 at 12:16pm by Anonymous

Physics Conservation of Energy
During a rockslide, a 740 kg rock slides from rest down a hillside that is 500 m long and 300 m high. The coefficient of kinetic friction between the rock and the hill surface is 0.18. (a) If the gravitational potential energy U of the rock-Earth system is set to zero at the ...
Sunday, February 10, 2013 at 5:10pm by Kevin

Physics Conservation of Energy
During a rockslide, a 740 kg rock slides from rest down a hillside that is 500 m long and 300 m high. The coefficient of kinetic friction between the rock and the hill surface is 0.18. (a) If the gravitational potential energy U of the rock-Earth system is set to zero at the ...
Sunday, February 10, 2013 at 6:18pm by Kevin

physics
As shown in the figure, a block of mass M1 = 0.470 kg is initially at rest on a slab of mass M2 = 0.850 kg, and the slab is initially at rest on a level table. A string of negligible mass is connected to the slab, runs over a frictionless pulley on the edge of the table, and ...
Monday, October 17, 2011 at 9:15am by Jimmy

PHysics!!
Starting from rest at a height equal to the radius of the circular track, a block of mass 25 kg slides down a quarter circular track under the influence of gravity with friction present (of coefficient μ). The radius of the track is 15 m. The acceleration of gravity is 9....
Tuesday, May 8, 2012 at 3:36pm by Bob

physics
The coefficient of static friction between a block and a horizontal floor is 0.414, while the coefficient of kinetic friction is 0.107. The mass of the block is 4.03 kg. A horizontal force is applied to the block and slowly increased. What is the value of the applied ...
Sunday, September 23, 2012 at 12:02pm by Liz

physics
a motorist runs out of gas and must push his 3000kg car across a flat road 200m to the gas station. ignoring friction how much work must be done in order to get the car to the gas pump? if the motorist accomplishes this in 10 minutes, how much power has he applied? what if the...
Saturday, January 8, 2011 at 12:06pm by matt

physics
A block of mass 2 kg is propelled by a spring with spring constant k=5200N/m onto a smooth (frictionless) track. The spring is initially compressed a distance of 0.13 m from its equilibrium configuration. At the end of the track there is a rough inclined plane at an angle of ...
Thursday, October 28, 2010 at 7:47pm by Nicole

physics
An object of mass 10.0 kg is released from the top of an inclined plane which makes an angle of inclination of 30 degrees with the horizontal. The object slides along the inclined plane. The questions refer to the instant when the object has traveled through a distance of 2.00...
Saturday, July 31, 2010 at 1:34pm by Chika

physics
A block of mass m is initially at rest at the top of an inclined plane with a height = 4.4 m which makes and angle of θ = 17 degrees with respect to the horizontal. It is observed to be traveling at v = 0.2 m/s a distance d after the end of the inclined plane as shown. ...
Monday, October 7, 2013 at 11:37pm by carlo

physics
The coefficient of static friction between a block and a horizontal floor is 0.35, while the coefficient of kinetic friction is 0.12. The mass of the block is 4.5 kg. A horizontal force is applied to the block and slowly increased. (a) What is the value of the applied ...
Thursday, February 16, 2012 at 10:23pm by Julie

physics
The coefficient of static friction between a block and a horizontal floor is 0.40, while the coefficient of kinetic friction is 0.15. The mass of the block is 5.0 kg. A horizontal force is applied to the block and slowly increased. (a) What is the value of the applied ...
Thursday, March 15, 2012 at 12:58am by nuwan

physics
The coefficient of static friction between a block and a horizontal floor is 0.40, while the coefficient of kinetic friction is 0.15. The mass of the block is 5.0 kg. A horizontal force is applied to the block and slowly increased. (a) What is the value of the applied ...
Thursday, March 15, 2012 at 12:59am by tharidu

physics
The coefficient of static friction between a block and a horizontal floor is 0.40, while the coefficient of kinetic friction is 0.15. The mass of the block is 5.0 kg. A horizontal force is applied to the block and slowly increased. (a) What is the value of the applied ...
Thursday, March 15, 2012 at 1:02am by tharidu

science
Examples of positive, negative and neutral friction? We always learned about friction as either being positive (tires gripping the road, brake friction for stopping etc.) or negative friction (causing wear or heat as in a bearing or engine due to parts moving against each ...
Sunday, March 16, 2008 at 9:36am by sw

physics please help!!
A moving 2.20kg block collides with a horizontal spring whose spring constant is 419 N/m. The block compresses the spring a maximum distance of 9.00cm from its rest postion. The coefficient of kinetic friction between the block and the horizontal surface is 0.140. a) What is ...
Thursday, October 6, 2011 at 8:55pm by archi

physics
A baseball player with mass m = 80 kg, sliding into second base, is retarded by a frictional force of magnitude 450 N. What is the coefficient of kinetic friction k between the player and the ground?
Sunday, February 21, 2010 at 1:43pm by Anonymous

MIT
A 2kg block on a flat horizontal surface is pulled with a force of 15 N directed 10 degrees above the horizontal. It is found to accelerate at 2m/s^2. Find the coefficient of kinetic friction at the interface?
Monday, July 9, 2012 at 6:47pm by Joe Parterner

physics
A block of mass m= 3 kg is initially at rest on a horizontal surface. At time t=0, we begin pushing on it with a horizontal force that varies with time as F(t)=βt2, where β= 0.6 N/s2. We stop pushing at time t1=5 s [F(t)=0 for t>t1]. (a) First, assume the surface ...
Monday, December 9, 2013 at 2:43pm by socorro

PHYSICS
A hollow tube (I = MR2) rolls without slipping along the surface. The ratio of its translational kinetic energy to its rotational kinetic energy is a. 1 b. 2 c. 3 d. 1/2 e. 1/3 I say A becasue both add up to get the total kinetic energy.
Wednesday, April 22, 2009 at 1:15pm by Sandy

AP Physics
Two 10 kilogram boxes are connected by a massless frictionless pulley. The boxes remain st rest with the one on the right hanging vertically and the one on the left 2.0 meters from the bottom of an inclined plane that makes an angle of 60 degrees with the horizontal. The ...
Sunday, November 4, 2007 at 7:57pm by Tim

physics
I keep geting this question wrong and cant figure out what i am doing wrong. Help please. When you push a 1.75- book resting on a tabletop, it takes 2.23 to start the book sliding. Once it is sliding, however, it takes only 1.45 to keep the book moving with constant speed. ...
Thursday, November 11, 2010 at 3:10pm by ju

PHYSICS PLEASE HELP !!!!!
An object with a mass of 3.7 kg slides in the positive x direction across a horizontal surface with a coefficient of kinetic friction of 0.24. During its slide a force of 364 Newtons acts on it in the positive x direction while a force of 44 Newtons acts on it in the negative ...
Thursday, October 27, 2011 at 2:45pm by Amanda

physics
a hockey puck is given the initial speed of 10 m/s. If the coefficient of kinetic friction between the ice and puck is 0.10, how far will the puck slide before stopping?
Tuesday, December 14, 2010 at 11:52am by ama

Physics
A man stands on a platform that is rotating (without friction) with an angular speed of 1.21 rev/s; his arms are outstretched and he holds a brick in each hand The rotational inertia of the system consisting of the man, bricks, and platform about the central axis is 4.32 kgm2...
Friday, November 18, 2011 at 8:29am by Aimee

physics
A child slides down a slide with a 28 incline, and at the bottom her speed is precisely three-fifths what it would have been if the slide had been frictionless. Calculate the coefficient of kinetic friction between the slide and the child Height= length/sin28 energy available...
Thursday, December 14, 2006 at 11:50am by Anonymous

science ( physics)
hello, i am having trouble with this problem. Calculate the average force of friction acting on a wood block as it is propelled along the floor by an elastic band ? my solution and my ideas: What does it mean by average froce of friction? I first weighed the peice of wood to ...
Wednesday, May 30, 2007 at 7:44pm by charlie

Physics
A 46.6 kg crate is at rest on a level floor, and te coefficient of kinetic friction is 0.32. The acceleration of gravity is 9.8M/s^2. If the crate is pushed horizontally with a force of 201.67 N, how far does it move in 3.42s? Answer in units of m
Tuesday, January 22, 2013 at 8:03pm by Cynthia

physics
A 20 kg sled rests on a horizontal surface. if it takes 75 N to start the sled in motion and 60 N to keep it moving at a constant speed, what are the coefficients of static and kinetic friction respectively? explain please
Saturday, November 8, 2008 at 4:22pm by kim

Physics
A skier skiing downhill reaches the bottom of a hollow with a velocity of 20.0m/s, and then coasts up a hill with a 12 degree slope. If the coefficient of kinetic friction is 0.11, how far up the slope will she travel before she stops?
Thursday, October 14, 2010 at 1:54pm by Jill

University Physics
Determine an equation for the total force needed to drag a box at constant speed across a surface with coefficient of kinetic friction uk when the force is applied at an angle theta.
Saturday, February 12, 2011 at 9:35am by Joshua

Physics
A skier (m=61.0 kg) starts sliding down from the top of a ski jump with negligible friction and takes off horizontally. If h = 7.70 m and D = 11.4 m, find H. Find her total kinetic energy as she reaches the ground.
Thursday, March 24, 2011 at 3:20pm by Anon

Physics
An ice skater slides (without pushing) across a frozen pond for 25.0 m before coming to a stop. If the coefficient of kinetic friction is 0.050, how fast was the skater initially moving?
Tuesday, July 24, 2012 at 4:43pm by Zac

Physics
A 22.0 kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 78.0 N and is directed at an angle of 30.0 above the horizontal. Determine the coefficient of kinetic friction.
Thursday, September 27, 2012 at 9:06pm by Anonymous

Physics
A 24.5-kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 77.0 N and is directed at an angle of 30.0 above the horizontal. Determine the coefficient of kinetic friction.
Thursday, September 26, 2013 at 6:14pm by Donna

physics
In the apparatus shown in the figure (Figure 1) , m1 = 10kg and the coefficients of static and kinetic friction between m1 and the table are 0.69 and 0.32, respectively. Part A What mass of m2 will just barely set the system in motion?
Thursday, October 3, 2013 at 3:13pm by tom

physics
A 28.0 block is connected to an empty 2.20 bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.44 and the coefficient of kinetic friction between the table and the block is 0.35. Sand is gradually added ...
Monday, October 31, 2011 at 10:26am by xxx

PHYSICS!!
A 10.2 kg crate is pulled up a rough incline with an initial speed of 1.5 m/s. The pulling force is 123.0 N parallel to the incline, which makes an angle of 14.6◦ with the horizontal. The coecient of kinetic friction is 0.39 and the crate is pulled a distance of 8.1 m. ...
Saturday, October 18, 2008 at 3:49pm by billy

physics
A 25 kg chair initially at rest on a horizontal floor requires 360 N horizontal force to set it in motion. Once the chair is in motion, a 316 N horizontal force keeps it moving at a constant velocity. a) Find the coefficient of static friction between teh chair and the floor...
Monday, November 8, 2010 at 5:20pm by Devon

physics
A 25 kg chair initially at rest on a horizontal floor requires 393 N horizontal force to set it in motion. Once the chair is in motion, a 301 N horizontal force keeps it moving at a constant velocity. a) Find the coefficient of static friction between teh chair and the floor. ...
Thursday, November 18, 2010 at 9:40am by Nate

Phyics
A box of mass 14.0 kg sits on a horizontal steel ramp 4.8 m long with a coefficient of static friction of 0.40 between the ramp and the box. The end of the ramp is slowly lifted until the box begins to slide down the ramp. What angle does the ramp make with the ground when ...
Thursday, March 20, 2014 at 5:27pm by Marlerne

Physics
A crate on a floor has an applied force 15 degrees below horizontal of 952N The crate moves with constant velocity. The coefficient of kinetic friction is 0.15. What is the mass of the crate ?
Tuesday, November 17, 2009 at 6:47pm by scott

Physics
On a frozen pond, a person kicks a 10.0 kg sled, giving it an initial speed of 12.2 m/s. How far does the sled move if the coefficient of kinetic friction between the sled and the ice is .10?
Friday, December 11, 2009 at 3:25am by Nicole

Physics
A 28.0kg block is connected to an empty 1.80kg bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.41 and the coefficient of kinetic friction between the table and the block is 0.35. Sand is gradually ...
Friday, September 25, 2009 at 10:48am by Ashley

physics
A roller-coaster car with a mass of 550 kg starts at rest from a point 46 m above the ground. At point B, it is 23 m above the ground. [Express your answers in kilojoules (kJ).] (a) What is the initial potential energy of the car? Incorrect: Your answer is incorrect. . kJ (b) ...
Saturday, September 28, 2013 at 9:29pm by Tammy

Physical Science
A 28.0kg block is connected to an empty 1.80kg bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.41 and the coefficient of kinetic friction between the table and the block is 0.35. Sand is gradually ...
Monday, September 28, 2009 at 12:46pm by Brittany

Physics
A box slides down a 36 ramp with an acceleration of 1.05 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.
Tuesday, October 19, 2010 at 1:00am by Diana

Physics
A box slides down a 36 ramp with an acceleration of 1.05 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.
Wednesday, October 20, 2010 at 12:16am by Diana

physics
A box slides down a 22 ramp with an acceleration of 1.19 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.
Sunday, October 31, 2010 at 10:42pm by Anonymous

Physics
A box slides down a 38.5 ramp with an acceleration of 1.47 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.
Thursday, December 2, 2010 at 8:01am by Zack

physics
A box slides down a 33 ramp with an acceleration of 1.38 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.
Sunday, December 5, 2010 at 5:19pm by Kevin

ramirez
A box slides down a 37 ramp with an acceleration of 1.24 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.
Friday, February 10, 2012 at 10:15am by joana

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