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April 16, 2014

Search: Physics (Static Friction)

Number of results: 109,828

physics
IP You want to nail a 2.4kg- board onto the wall of a barn. To position the board before nailing, you push it against the wall with a horizontal force to keep it from sliding to the ground What happens to the force of static friction if you push against the wall with a force ...
Thursday, November 11, 2010 at 6:39pm by mathhelp

Physics
Static friction force = 8.0 N = (static friction coefficient) x M g M = 2.0 kg; g = 9.8 m/s^2 Solve for the static friction coefficient
Tuesday, September 25, 2007 at 7:12pm by drwls

Physics (Static Friction)
When you take your 1300-kg car out for a spin, you go around a corner of radius 56.9 m with a speed of 15.8 m/s. The coefficient of static friction between the car and the road is 0.75. Assuming your car doesn't skid, what is the force exerted on it by static friction? I got ...
Wednesday, July 28, 2010 at 7:06pm by David

PHYSICS
6. Drag-race tires in contact with an asphalt surface have a very high coefficient of static friction. Assuming a constant acceleration and no slipping of tires, estimate the coefficient of static friction needed for a drag racer to cover 2.1 km in 8 s, starting from rest. ...
Sunday, February 23, 2014 at 7:10pm by SHAWN

Physics
Static friction keeps the heavy object from moving. Unless your shoes slip pushing it, there is static friction below your feet also.
Friday, June 24, 2011 at 5:20pm by drwls

physics
What is 0.8? The coefficient of friction? Static or kinetic? If they are at rest on a horizontal plane, and the cord is unstretched, friction is zero. In some situations (incline or stretched cord) there can be static friction sufficient to maintain equilibrium. You have not ...
Sunday, January 9, 2011 at 9:42pm by drwls

Physics
If you try to push an object that is 10 times heavier than you would there be static or kinetic friction? ( the heavy object doesn't move if even you use force) -I know that there is no kinetic friction because the object is not moving. I am not sure about static friction.
Friday, June 24, 2011 at 5:20pm by Susan

physics
If static friction were not greater than kinetic, an object on an inclined plane that is tilted enough to overcome static friction, and start sliding, would immediately stop sliding. That is not what happens.
Tuesday, July 19, 2011 at 9:53am by drwls

physics
Drag-race tires in contact with an asphalt surface have a very high coefficient of static fric.tion. Assuming a constant acceleration and no slipping of tires, estimate the coefficient of static friction needed for a drag racer to cover 2.1 km in 8 s, starting from rest. ...
Friday, February 21, 2014 at 1:14pm by ryan

Physics
If the penguin isn't budging, the friction force equals the opposing force, 10 N. This may be much less than the maximum static friction force possible, which is 52*g*mu(static).
Tuesday, December 14, 2010 at 7:12pm by drwls

PHYSICS
A student wants to determine the coefficients of static friction and kinetic friction between a box and a plank. She places the box on the plank and gradually raises one end of the plank. When the angle of inclination with the horizontal reaches 30, the box starts to slip, ...
Saturday, December 13, 2008 at 10:16pm by john

Physics
A student wants to determine the coefficients of static friction and kinetic friction between a box and a plank. She places the box on the plank and gradually raises one end of the plank. When the angle of inclination with the horizontal reaches 30, the box starts to slip, ...
Thursday, October 1, 2009 at 11:32am by Mario

physics
(a) The desk pushing against your hand (b) Your hand, pushing the desk. (c) The force applied to the desk was less than the amount necessary to overcome static friction. The desk is heavy and has a high static friction coefficient where the legs touch the floor. Newton's law ...
Thursday, February 18, 2010 at 6:04am by drwls

Physics
Let mu_s be the static friction coefficient. If the road is not banked and the car is on the verge of slipping, the maximum static friction force equals the centripetal force. M*g*mu_s = M*V^2/R Cancel the M's. V^2 = R*g*0.66 Solve for V
Friday, March 4, 2011 at 7:44pm by drwls

Physics
You will need to show some work for further assistance. The static friction force provides the centripetal force needed to turn on an unbanked road. With no slipping, it will be less than or equal to the maximum possible static friction, which is 0.88 Mg in this case.
Tuesday, March 2, 2010 at 10:51pm by drwls

Physics (simple stuff)
. Does the force of friction depend on the area of the sliding surface? What is larger, static friction or sliding friction when an object is stationary? Why sand is placed on icy streets and sidewalks? )something to do with friction) how could you reduce sliding friction
Tuesday, March 31, 2009 at 12:06am by drago

Physics
the only part i cant figure out is the max static friction force that acts on the block. please help show me how to find it Suppose a block with mass 2.00 kg is resting on a ramp. If the coefficient of static friction between the block and the ramp is 0.320, what maximum angle...
Saturday, May 21, 2011 at 11:52am by sarah

Physics
When you take your 1000- car out for a spin, you go around a corner of radius 57 with a speed of 19 . The coefficient of static friction between the car and the road is 0.88. Assuming your car doesn't skid, what is the force exerted on it by static friction?
Thursday, November 3, 2011 at 2:47pm by Chris

PHYSICS
Ff is force friction. Fn is the normal force, not the mass of the object. The normal force does depend on the weight of an object, which ultimately depends on the mass. Although there is no difference in the actual equations for physics, there is a difference between kinetic ...
Thursday, April 16, 2009 at 11:26pm by Carlie

Physics
When you take your 1200 kg car out for a spin, you go around a corner of radius 51 m with a speed of 12 m/s. The coefficient of static friction between the car and the road is 0.88. Assuming your car doesn't skid, what is the force exerted on it by static friction?
Tuesday, March 2, 2010 at 10:51pm by Abby

physics
When you take your 1000-kg car out for a spin, you go around a corner of radius 57 m with a speed of 11 m/s. The coefficient of static friction between the car and the road is 0.88. Assuming your car doesn't skid, what is the force exerted on it by static friction?
Sunday, March 6, 2011 at 11:14pm by Randy

physics
When you take your 1300-kg car out for a spin, you go around a corner of radius 57.7 m with a speed of 16.5 m/s. The coefficient of static friction between the car and the road is 0.93. Assuming your car doesn't skid, what is the force exerted on it by static friction?
Thursday, April 12, 2012 at 3:56pm by Anonymous

physics
When you take your 1200 kg car out for a spin, you go around a corner of radius 54.5 m with a speed of 16.2 m/s. The coefficient of static friction between the car and the road is 0.95. Assuming your car doesn't skid, what is the force exerted on it by static friction?
Friday, October 12, 2012 at 5:29pm by Anonymous

physics
A large block P executes horizontal simple harmonic motion as it slides across a frictionless surface with a frequency f = 1.7 Hz. Block B rests on it, as shown in the figure, and the coefficient of static friction between the two is s=0.64. (b) What is the maximum force of ...
Monday, November 26, 2012 at 6:37pm by Anonymous

physics
A large block P executes horizontal simple harmonic motion as it slides across a frictionless surface with a frequency f = 1.7 Hz. Block B rests on it, as shown in the figure, and the coefficient of static friction between the two is s=0.64. (b) What is the maximum force of ...
Wednesday, November 28, 2012 at 11:42pm by Anonymous

Physics
To avoid slipping, the maximum static friction force, M g Us, must exceed the centripetal force M V^2/R Set them equal and solve for the static friction coefficient, Us. Us = V^2/(R*g) That will be the minimum value required.
Wednesday, February 9, 2011 at 11:44pm by drwls

Physics
Consider a car is heading down a 5.5 slope (one that makes an angle of 5.5 with the horizontal) under the following road conditions. You may assume that the weight of the car is evenly distributed on all four tires and that the coefficient of static friction is involvedthat...
Friday, February 21, 2014 at 8:42pm by Maura

Physics
The equation of motion for a solid sphere rolling uphill is M*g sinbeta-(2/5)M*a = M*a The second term on the right is the friction force, assuming no slipping. Rearranging gives you a = g*sinbeta/1.4 To prevent slipping, the friction force (2/5)M*a = (2/5)M*g*sinbeta*(5/7...
Tuesday, April 3, 2012 at 6:34pm by drwls

Physics
A crate of potatoes of mass 23.0 kg is on a ramp with angle of incline 30 to the horizontal. The coefficients of friction are μs = 0.78 and μk = 0.35. Find the frictional force (magnitude and direction) on the crate if the crate is at rest. I don't understand why I ...
Sunday, September 23, 2012 at 1:24am by Alyssa

Physics
When you take your 1300-kg car out for a spin, you go around a corner of radius 57.8 m with a speed of 15.2 m/s. The coefficient of static friction between the car and the road is 0.82. Assuming your car doesn't skid, what is the force exerted on it by static friction? Please ...
Tuesday, October 16, 2012 at 1:00am by Alyssa

Physics
1.a (static friction is pushing up on the box to keep it from sliding down the incline) 2.b (static friction is pushing down on the box to keep him from moving it up the incline) ^^friction always pushes the opposite direction of the force acting on the object^^ 3.Fphysisist &...
Monday, September 22, 2008 at 4:34pm by Kyle

Physics
Which of the following surfaces has the largest amount of static friction against your skin? Which one has the highest coefficient of static friction against your skin? Select one: a. sandpaper b. ice c. wax paper d. A Teflon coated sheet.
Sunday, September 22, 2013 at 10:10pm by Kelsey

physics
One last question: If a 12lb. block is slowly tilted from horizontal when the plank reaches 30 degrees the block begins to slide. To find the coefficient of the static friction you take the tangent form of 30 degrees? To find the friction force you multiply the coefficient of ...
Sunday, January 27, 2008 at 12:17am by Charles

physics
A 2000 kg car negotiates a curve of radius 40.0m on a level road. The static friction coefficient between the tires and the pavement is 0.7. Calculate the maximum force of static friction for the car and the maximum speed with which it will be able to negotiate the curve.
Monday, October 29, 2007 at 3:11pm by johnny

physics
A 1,660 kg car is parked on a hill with a slope of 8.0. Its brakes and transmission are locked in position to keep the car from rolling. The coefficient of static friction of the rubber tires on the asphalt road is 0.14. What is the force of static friction between the tires ...
Tuesday, November 6, 2012 at 7:49pm by anon

physics
By using static friction coefficient Uk, we assume that the car does NOT go into a skid. The maximum static friction amount is applied to the tires even though they are still turning. That force decelerates the car over a distance X friction work = Uk*M g X = (1/2) M V^2 X = V...
Sunday, November 9, 2008 at 1:44am by drwls

physics
I'm assuming you're referring to kinetic friction here, in either case (static or kinetic friction) however the following method is able to find the answer. Friction=mass*g*friction constant In this case the force of friction is equal and opposite to 20N, so Friction= -20. -20...
Wednesday, October 26, 2011 at 2:43pm by Peter

Physics
I assume you mean the static coefficent of friction is .5 Given that, then the force of friction static on the top box is .5(5)g max. over that, and it slides. .5(5g)<ma .5*5g<5a or a=.5g Now to achieve that acceleration, then tension=totalmass*.5g=(15)(.5g)
Tuesday, October 6, 2009 at 10:22am by bobpursley

Physics
A 55 kg ice skater, initially at rest on a flat skating rink, requires a 198 N horizontal force to be set in motion. However, after the skater is in motion, a horizontal force of 175 N keeps her moving at a constant velocity. Find the coefficients of static and kinetic ...
Tuesday, December 5, 2006 at 11:28pm by Anonymous

Physics 204
I have a few questions. 1.The coefficient of sliding friction between steel skate blades and ice is .05. How much force must be applied to a 150lb. skater to maintain a constant velocity? 2. If it takes a force of 6 pounds to cause a 24 pound box to slide on a level surface, ...
Monday, January 21, 2008 at 12:42am by Charles

physics
The coefficient of static friction between the tires of a car and a horizontal road is 0.515. As the car brakes, what is the magnitude of the maximum acceleration of the car? Assume the net force on the car is the maximum static friction force.
Friday, February 5, 2010 at 8:09am by Kevin

physics
A 3.0 m long ladder of weight 98. N leans against a frictionless wall at an angle of 60. with respect to the horizontal. The coefficient of static friction between the ground and the ladder is s=0.45. If the ladder is not sliding, the magnitude of the force of static ...
Tuesday, January 11, 2011 at 8:00pm by noreen

PHYSICS
Please remove your caps lock in future. Perform a force balance. Let Us be the reuired static friction coefficient. (static) friction force = steel ball weight 50 kg * g *cos30 * Us = 20 kg * g Cancel out g; solve for Us. It will be a lower limit
Friday, September 16, 2011 at 2:44am by drwls

Physics (Mechanics)
A 10-kg crate on a ramp is inclined at 30 degrees from the horizontal and released. The coefficients of friction between them are .48 (coefficient of static friction) and .28 (coefficient of kinetic friction). a) Does the block slide? b) What then is the actual friction force...
Sunday, September 30, 2012 at 5:36pm by Anonymous

physics
why is static friction bigger than kinetic friction
Thursday, December 9, 2010 at 6:40pm by Michelle

Physics
A trash can with a mass of 5 kg has a coefficient of static friction of μs = 0.80 and a coefficient of kinetic friction of μk = 0.22. (The Active Figure applies to a similar situation, but the values of the mass, coefficient of static friction and coefficient of ...
Saturday, February 8, 2014 at 3:43pm by Ray

physics
yeah the coefficient of static friction is 0.5 and coeffient of kinetic friction is 0.4. theta is measured below the horizontal
Sunday, September 13, 2009 at 5:47pm by Jessi

Physics
1. What you call "state" friction is the STATIC friction coefficient. After it starts moving, what you need to use is the kinetic friction coefficient, 0.46. Multiply that by the weight to get the kinetic friction force. Fk = 0.46 M g = 20.29 N The force that barely started it...
Saturday, June 16, 2012 at 11:16pm by drwls

physics
The accelerating force M*a must not exceed the maxmum static friction force mus*M*g. (mus is the static friction coefficient) Therefore a < mus*g Solve for the maximum acceleration a. This assumes that the road surface is not banked, as it is on most sharp turns. When a ...
Friday, February 5, 2010 at 8:09am by drwls

high school physics static friction
The system shown below is in equilibrium. Using the fact that block A is placed on a table, has a normal force of 40.2 N and it is not moving, what is the coefficient of static friction on block A? I know you can't answer this but if you have any suggestions: Calculate the ...
Wednesday, December 8, 2010 at 9:24pm by Jess

PHYSICS
A large stone block has been loaded in the bed of a dump truck. The bed is slowly raised until it makes an angle of 30 degrees with the horizontal; at this point, the block starts to slide downward. What is the coefficient of static friction between the block and the truck bed...
Sunday, February 23, 2014 at 7:21pm by chris

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 - Friction
**Especially part a) A person, sunbathing on a warm day, is lying horizontally on the deck of a boat. Her mass is 54.6 kg, and the coefficient of static friction between the deck and her is 0.683. Assume that she is moving horizontally, and that the static frictional force is ...
Friday, September 27, 2013 at 10:33am by Kir

physics
a)centripetal acceleration is v^2/r. In this case, v is 30 mi/hr and r = 200 ft. The inertial force would be: F = ma = mv^2/r (1) This would be the friction force required to keep the car on its path. b) The static friction is: F = uN (2) where u is the static friction ...
Thursday, March 11, 2010 at 10:33am by FredR

Physics
I am not sure that I understand what you mean. If Ff is the friction force and Fg is the weight (on a level surface), then Ff = Uk* Fg if the object is moving. Ff = Us* Fg is the maximum static friction force that keeps it from moving. Us and Uk are the static and kinetic ...
Thursday, April 12, 2012 at 2:11pm by drwls

Physics
An object in static equilibrium has a coefficient of static friction as 0.110. If the normal force acting on the object is 95.0 newtons, what is the mass of the object?
Monday, April 23, 2007 at 10:46pm by ksg

physics
An object in static equilibrium has a coefficient of static friction as 0.110. If the normal force acting on the object is 95.0 newtons, what is the mass of the object?
Tuesday, May 21, 2013 at 9:54am by ksg

physics
An object in static equilibrium has a coefficient of static friction as 0.110. If the normal force acting on the object is 95.0 newtons, what is the mass of the object?
Tuesday, May 21, 2013 at 9:54am by Anonymous

physics
A 2.0kg box rests on a plank that is inclined at an angle of 65 above the horizontal. The upper end of the box is attached to a spring with a force constant of 25 N/m. If the coefficient of static friction between the box and the plank is 0.17, what is the maximum amount the ...
Monday, May 21, 2007 at 8:35pm by micole

physics
You have a mass of 71 kg and are on a 51-degree slope hanging on to a cord with a breaking strength of 165 newtons. What must be the coefficient of static friction to 2 decimal places between you and the surface for you to be saved from the fire? In the previous problem if the...
Saturday, June 16, 2012 at 1:52pm by kelly

Physics 204
So to figure out maximum friction force possible without sliding, thats the product of the 23lb block and the static friction of .6. that will be A? Then I'm not sure what to do next
Monday, January 21, 2008 at 10:57am by Charles

physics- please respond
(a) Initial kinetic energy = (Potential energy increase) + (work against friction) Let X be the distance traveled up the incline. (M/2)V^2 = M*g*X sin28 + M*g*cos28*(0.27)X M cancels out. Solve for X X = (V^2/2g)/[sin28 + 0.27cos28] (b) To make sure it slides back down the ...
Friday, May 25, 2012 at 1:59am by drwls

physics
To start the crate sliding down the incline, you must provide a force component in that direction that exceeds the maximum static friction force minus the weight component in that direction. When the two forces are equal, M g cos 19.5 * Us = M g sin 19.5 + 537 cos19.5 where Us...
Wednesday, November 9, 2011 at 5:59pm by drwls

Physics
10. You try to move a couch across the floor but it doesn't move. What is the other force acting on the couch? A. only you B. inertia C. static friction (my answer) D. kinetic friction 11. You finally get the couch in Problem 10 to move. What other force is acting on the couch...
Thursday, April 9, 2009 at 2:42pm by Jasmine

Physics please help its urgent i need help
b. frictional force on the truck equals ma if the crate did not move. If the force due to acceleration (ma) has overcome static friction, then the friction force will be μkmg (when the crate is sliding). To determine if the crate started to slide see (c) below. (c) The ...
Thursday, February 16, 2012 at 10:07pm by MathMate

circular motion
When you take your 1300-kg car out for a spin, you go around a corner of radius 57.7 m with a speed of 16.5 m/s. The coefficient of static friction between the car and the road is 0.93. Assuming your car doesn't skid, what is the force exerted on it by static friction?
Thursday, April 12, 2012 at 3:55pm by Anonymous

Physics 1
A taut string connects a 5-kg crate to a 12-kg crate (see figure below). The coefficient of static friction between the smaller crate and the floor is 0.573; the coefficient of static friction between the larger crate and the floor is 0.443. Find the minimum horizontal force ...
Saturday, February 16, 2013 at 5:42pm by Sarah

Physics
A 0.5 kg wooden block is placed on top of a 1.0 kg wooden block. The coefficient of static friction between the two blocks is 0.35. The coefficient of kinetic friction between the lower block and the level table is 0.2. What is the maximum horizontal force that can be applied ...
Sunday, October 30, 2011 at 11:40am by Emily

Physics
When you are considering the force necessary to maintain a static condition, you use the static coefficient of friction. The maximum possible friction force is in that case 70.7*cos21.6 *0.23 = 15.12 N, The component of the gravity force down the plane is M g sin 23.6 = 70.7*0...
Saturday, December 8, 2007 at 9:24am by drwls

Physics
When you are talking about a no-slipping condition, the static coefficient of friction, 0.23 in this case, is what matters. There is a gravity weight component of 70.7 sin 21.6 = 26.0 N parallel to the incline. The maximum static friction force than can resist motion, in the ...
Monday, December 3, 2007 at 5:07pm by drwls

PHYSICS
Whats the difference between the formulas for kinetic and static friction. Kinetic: Ff= ukFn Static: Ff= usFn Are the 'f' and the 'n' the mass of the object? Are the 'k' and the 's' just the
Thursday, April 16, 2009 at 11:26pm by Lena

physics
If the table is smooth, it should be N=69N normal to the table in all cases. If the table is rough, with a coefficient of kinetic or static friction of μ, then it falls into two cases: There is no motion, T<μN, T=tension in rope. Then the force exerted on the box by ...
Thursday, October 8, 2009 at 10:07pm by MathMate

Physics
A 150N block rests on a table. The suspended mass has a weight of 73N. a) What is the magnitude of the minimum force of static friction required to hold both blocks at rest? Answer in units of N b)What minimum coefficient of static friction is required to ensure that both...
Sunday, October 21, 2012 at 5:53pm by Peter

Physics
A 150N block rests on a table. The suspended mass has a weight of 73N. a) What is the magnitude of the minimum force of static friction required to hold both blocks at rest? Answer in units of N b)What minimum coefficient of static friction is required to ensure that both...
Sunday, October 21, 2012 at 5:55pm by Peter

Physics, Science
A 26 kg block is connected to an empty 1 kg bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.435 and the coefficient of kinetic friction between the table and the block is 0.320. Sand is gradually ...
Sunday, October 3, 2010 at 9:12pm by Shae

physics
A 10-KG block is pulled along a rough horizontal floor by a 12-N force acting at a 30 degrees angle with respect to the horizontal. The block accelerates at 0.1 m/s2. Calculate A....... the weight of the block B...... the force of friction acting on the block C.... the normal ...
Friday, October 8, 2010 at 11:57pm by Bolo

physics
A 10-KG block is pulled along a rough horizontal floor by a 12-N force acting at a 30 degrees angle with respect to the horizontal. The block accelerates at 0.1 m/s2. Calculate A....... the weight of the block B...... the force of friction acting on the block C.... the normal ...
Saturday, October 9, 2010 at 12:11am by Bolo

Physics
A 10-KG block is pulled along a rough horizontal floor by a 12-N force acting at a 30 degrees angle with respect to the horizontal. The block accelerates at 0.1 m/s2. Calculate A....... the weight of the block B...... the force of friction acting on the block C.... the normal ...
Saturday, October 9, 2010 at 9:53am by Esthere G

Physics
2 * F * mus = weight mus = static friction coefficient = 0.36 Solve for F. The 2 is there because there is friction on both sides.
Monday, February 15, 2010 at 10:58pm by drwls

physics
Normal force = m g friction force static = .6 mg for no slip = m a .6 m g = m a a = .6 g or about .6*9.8 = 5.88 m/s^2 F sliding friction = .3 m g = m a a = .3 g = 2.94 g
Wednesday, June 22, 2011 at 4:37pm by Damon

Physics
Can the coefficient of static friction be greater than one? Less than zero? How about for the coefficient of kinetic friction? Please explain.
Monday, October 17, 2011 at 3:43pm by A

PHYSICS URGENT! PLEASE FRICTION CASE 2
A 13 kg box is at rest on a level floor. The coefficient of static friction S = 0.9 and the coefficient of kinetic friction K = 0.8. Audrey is applying a 140 N push at an angle (=20) as shown in Figure 1. C) What is the magnitude of FNormal on box from Earth?
Tuesday, December 4, 2012 at 7:14pm by Sophia

Physics
A 13.0 kg box is released on a 33 degree incline and accelerates down the incline at 0.20 m/s^2. 1. Find the friction force impeding its notion? 2. What is the coefficient of kinetic friction? *Are we dealing with Kinetic or Static Friction...this will effect coefficient ...
Wednesday, June 13, 2012 at 10:51am by Mike

physics
To measure the static friction coefficient between a 1.6-kg block and a vertical wall, the setup shown in the drawing is used. A spring (spring constant = 400 N/m) is attached to the block. Someone pushes on the end of the spring in a direction perpendicular to the wall until ...
Tuesday, November 26, 2013 at 3:29pm by Donna

Physics
An object of mass M rests on a horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m. There is static friction between the horizontal surface and mass M. The coefficient of static friction is 0.75 and M=15. ...
Thursday, October 22, 2009 at 5:43pm by Nikita

Physics
A string is tied to a 4.4 kg block and a 120 g hanging bucket. students add 20 g washers one at a time to the bucket. the students are unaware that the coefficient of static friction for the block on the table is 0.42. What is the maximum force of static friction for the block...
Sunday, October 9, 2011 at 12:47pm by Luis

physics
A string is tied to a 4.4 kg block and a 120 g bucket from a pulley. Students add 20 g washers one at a time to the bucket. the students are unaware that the coefficient of static friction for the block on the table is 0.42. a) what is the maximum force of static friction for ...
Tuesday, October 11, 2011 at 12:33am by Ika

physics
A 74 kg box rests on a level surface. The coefficient of static friction, S = 1.1 and the coefficient of kinetic friction, K = 0.7 . What is the magnitude of Friction on the box from the surface?
Friday, October 4, 2013 at 8:54pm by becky

Physics 11
Two people start running from rest. The first person has a mass of 59 kg and is wearing dress shoes with a coefficient of static friction of 0.52. The other person is wearing running shoes with a coefficient of static friction of 0.66. Explain why we do not really need the ...
Sunday, March 31, 2013 at 6:02pm by Anonymous

Physics
A 6.40 kg block rests on a 12.5 kg block as shown in the diagram. The interface between the lower mass and the table is frictionless, but there is friction (static friction μS and kinetic friction μK) between the two blocks. A horizontal force F r acts on the UPPER ...
Sunday, February 24, 2013 at 12:12pm by Meder

Physics
In each case, there are two vertical forces: the weight and the applied force P. Multiply the sum of them by 0.4 (the static friction coefficient) to get the maximum force required to overcome friction. If this force is not exceeded by F, the block will not move. In that case...
Saturday, October 8, 2011 at 3:21am by drwls

Physics 204
If there is a 23lb. block on a plank and the static friction is .6 and the sliding friction is .35. What angle must the plank be raised to just allow the box to slide?
Monday, January 21, 2008 at 10:57am by Charles

Science
Inclination angle of 38.0 degrees with respect to the horizontal. Suppose a truck on a street, for the truck to remain at rest, a static friction must exist. If an additional force with a magnitude equal to one-fourth the weight of the truck is applied uphill in order to hold ...
Thursday, March 24, 2011 at 9:51am by Taylor

Physics
The trick t this problem is to realize that the suitcase iss ON THE VERGE OF slipping. The static coefficient of friction detremines the maximum possible friction force wthout slipping. The actual force can be much less. Based upon the observation that the suitcase slipped ...
Monday, March 3, 2008 at 2:08pm by drwls

physics
a 5-kg crate is resting on a horizontal plank. the coefficient of static friction is .5 and the coefficient of kinetic friction is .4. after one end of the plank is raised so the plank makes an angle of 25 degrees with the horizontal, the force of friction is?
Tuesday, October 26, 2010 at 11:29am by colin

physics
Fb = 10N @ 0deg. Fh = 5N. = Hor Force. Fv = 10cos(0) = = 10N. = Force perpendicular to the table. 1. Fn = Fh - Fs = 0, 5 - Fs = 0, Fs = 5N. = Force of static friction. u = Fs/Fv = 5/10 = 0.50 = Coefficient of static friction.
Thursday, November 24, 2011 at 12:16am by Henry

physics
A stick of length l = 60.0 cm rests against a wall. The coefficient of static friction between stick and the wall and between the stick and the floor are equal. The stick will slip off the wall if placed at an angle greater than θ = 49.0 degrees. What is the coefficient ...
Monday, December 9, 2013 at 3:08am by sid

physics Classical Mechanics
A stick of length l =70.0cm rests against the wall. The coefficient of static friction between stick and wall and between the stick and the floor are equal. The stick will slip off the wall if placed at an angle greater than theta = 41 degrees. What is the the coefficient of ...
Tuesday, December 10, 2013 at 9:46am by Hil

Physics
A block with mass M rests on a frictionless surface and is connected to a horizontal spring of force constant k, the other end of which is attached to a wall. A second block with mass m rests on top of the first block. The coefficient of static friction between the blocks is ...
Wednesday, January 12, 2011 at 5:02pm by Jon

physics
A 5-kg crate is resting on a horizontal plank. The coeffi- cient of static friction is 0.5 and the coefficient of kinetic friction is 0.4. After one end of the plank is raised so the plank makes an angle of 25 with the horizontal, the force of friction is?
Sunday, January 20, 2013 at 8:42am by ashlee

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