Thursday

February 11, 2016
Number of results: 127,920

**physics**

A worker stands still on a roof sloped at an angle of 23 above the horizontal. He is prevented from slipping by a static frictional force of 540 N. Find the mass of the worker.
*February 3, 2011 by Anonymous*

**physics**

worker stands still on a roof sloped at an angle of 30 above the horizontal. He is prevented from slipping by a static frictional force of 560 N. Find the mass of the worker.
*September 23, 2014 by chidera*

**physics**

The roof on a house rises 1.50 m over a horizontal diestance of 3.50 m. A 72.9-kg roofer stands on the roof. Is the frictional force that keeps the roofer from slipping equal in magnitude to F perpendicular or F paralell? What is its magnitude?
*December 7, 2009 by Corey*

**physics**

the roof on a house rises 1 .00 m over a horizontal distance of 3.5 m. a 71 kg roofer stands on the roof. is the frictional force that keeps the roofer from slipping equal in magnitude to fparallel or fperpendicular? what is the magnitude of this force? I'm pretty sure its ...
*November 28, 2011 by inclined plane*

**Physics**

A force F = 119 N acts at an angle α = 31◦ with respect to the horizontal on a block of mass m = 22.5 kg, which is at rest on a horizontal plane. The acceleration of gravity is 9.81 m/s 2 . If the static frictional coefficient is s = 0.72, what is the force of ...
*January 11, 2016 by andrew*

**physics**

A solid sphere of uniform density starts from rest and rolls without slipping down an inclined plane with angle θ = 30o. The sphere has mass M = 8 kg and radius R = 0.19 m . The coefficient of static friction between the sphere and the plane is μ = 0.64. What is the ...
*November 6, 2014 by stewart*

**emgineering**

A box with a mass of 5.0 kg is placed on a flat sloping surface elevated at 40o to the horizontal. The coefficient of static friction is 0.76. It is prevented from slipping down the slope by a force applied parallel to the slope. What is the magnitude of this force?
*November 6, 2015 by Anonymous*

**Physic**

Block A of mass 2.2 kg is on block B of mass 5.2 kg as shown in the above figure. The lower block is on a frictionless surface while the coefficient of static friction is 0.3 between the two blocks. a) If they are moving at constant velocity, what is the frictional force ...
*October 25, 2015 by Anonimea*

**Physics**

A hollow spherical shell with mass 2.45kg rolls without slipping down a slope that makes an angle of 30.0∘ with the horizontal. a.) find the magnitude of the acceleration of the center of mass of the spherical shell. b.) find the magnitude of the frictional force acting ...
*March 12, 2015 by Rosae*

**Physics**

A hollow spherical shell with mass 2.45kg rolls without slipping down a slope that makes an angle of 30.0∘ with the horizontal. a.) find the magnitude of the acceleration of the center of mass of the spherical shell. b.) find the magnitude of the frictional force acting ...
*March 12, 2015 by Rosae*

**Physics**

A hollow spherical shell with mass 2.45kg rolls without slipping down a slope that makes an angle of 30.0∘ with the horizontal. a.) find the magnitude of the acceleration of the center of mass of the spherical shell. b.) find the magnitude of the frictional force acting ...
*March 13, 2015 by Rosae*

**Physics**

A uniform 5.32 kg solid sphere of radius 0.344 m that is free to roll on a horizontal surface has a light axle passing through its diameter as shown. The axle is connected to a like yoke and in turn a light rope as shown. A constant tension of 7.81 N is applied ot the rope and...
*November 14, 2012 by Alphonse*

**mechanics**

A crate of mass 80 kg stands on level ground. A worker exerts a horizontal force of 120 N on the crate. If the coefficient of friction between the crate and the ground is 0.25, and F N is the magnitude of the frictional
*November 11, 2012 by Karabo*

**PHYSICS**

There's a bar with length of 6.49m and mass of 5.45kg leaning against a frictionless wall. It makes an angle of 66.08 deg with the ground. A block with mass of 44.98 kg hangs from bar at distance d up from point of contact between bar and floor. The frictional force (us=.371) ...
*October 24, 2007 by Alie*

**Physics**

A Ladder of length L and mass m leans against wall at angle theta from the vertical. The wall is smooth so that only horizontal force N is exerted on the top of the ladder. A fireman of mass M climbs a distance d upward as measured along the ladder. (a): Assuming the ladder ...
*December 6, 2012 by Mike*

**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 ...
*September 23, 2012 by Alyssa*

**physics**

Bill the firefighter stands on an 8 meter ladder of weight 355 Newtons leaning against a smooth vertical wall. The ladder makes an angle of 50 degrees with the horizontal floor. The wall cannot provide any frictional force only a normal force. All frictional force acting on ...
*November 4, 2012 by Anonymous*

**Physics**

A person, sunbathing on a warm day, is lying horizontally on the deck of a boat. Her mass is 59.6 kg, and the coefficient of static friction between the deck and her is 0.696. Assume that she is moving horizontally, and that the static frictional force is the only force acting...
*December 19, 2012 by Sadie*

**Physics**

A person pushes on a 62-kg refrigerator with a horizontal force of -256 N; the minus sign indicates that the force points in the −x direction. The coefficient of static friction is 0.61. (a) If the refrigerator does not move, what are the magnitude and direction of the ...
*September 27, 2011 by Natalie*

**Physics**

A building has a symmetric roof made from two straight sections at an angle of 20 above the horizontal. The sides are uniform and have a mass of m = 1800 kg. Find the magnitude of the horizontal force that this roof exerts at the top of the wall, pushing it outward. Before ...
*November 11, 2007 by Lou-Anne*

**physics**

solid sphere of uniform density starts from rest and rolls without slipping down an inclined plane with angle = 30o. The sphere has mass M = 8 kg and radius R = 0.19 m . The coefficient of static friction between the sphere and the plane is = 0.64. What is the magnitude of...
*March 31, 2013 by phil*

**Physics**

A box of textbooks of mass 25.3 kg rests on a loading ramp that makes an angle (ALFA) with the horizontal. The coefficient of kinetic friction is 0.260 and the coefficient of static friction is 0.330 . A) As the angle (ALFA) is increased, find the minimum angle at which the ...
*November 18, 2006 by Jasijo*

**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 ...
*September 27, 2013 by Kir*

**physics**

The cart of mass 10 kg shown above moves without frictional loss on a level table. A 30 N force pulls on the cart horizontally to the right. At the same time, a 10 N force at an angle of 60 above the horizontal pulls on the cart to the left. What is the magnitude of the ...
*February 4, 2014 by ashley*

**Physics**

*I really don't know how to get started. I have done lots of the homework, but this one (and a couple of others) are really giving me PROBLEMS.* A stockroom worker pushes a box with a mass 10.5 kg on a horizontal surface with a constant speed of 3.00 m/s. The coeffecients of ...
*October 1, 2006 by John*

**Physics Classical Mechanics**

A person of mass m2= 85.0 kg is standing on a rung, one third of the way up a ladder of length d= 4.0 m. The mass of the ladder is m1= 15.0 kg, uniformly distributed. The ladder is initially inclined at an angle θ= 40.0∘ with respect to the horizontal. Assume that ...
*December 12, 2013 by Robert*

**11th grade physics**

Rachel pulls her 177N suitcase at a constant speed by pulling on a handle that makes an angle (-) with the horizontal. Using frictional force on the suitcase as 27N and Rachels force on 43N on the handle to calculate the net force. 1. What angle does the handle make with the ...
*November 2, 2010 by Zack*

**physics**

A large building has an inclined roof. The length of the roof is 69.5 m and the angle of the roof is 18.0 below horizontal. A worker on the roof lets go of a hammer from the peak of the roof. Starting from rest, it slides down the entire length of the roof with a constant ...
*April 3, 2013 by Anonymous*

**physics**

A 1.5 kg chunk of ice slides down a roof sloped at a 60 degree angle with the horizontal. If there is no friction, determine the acceleration of the ice. Show that the amount of mass doesn't matter in part a.
*October 26, 2010 by caroline*

**physics**

A 63.8 N crate is pulled up a 5.22 m inclined plane by a worker at constant velocity. If the plane is inclined at an angle of 59 degree to the horizontal and there exists a constant frictional force of 32.6 N between the crate and the surface, what is the force applied by the ...
*April 7, 2013 by need help please*

**Southern Union**

A large building has an inclined roof. The length of the roof is 64.0 m and the angle of the roof is 20.0 below horizontal. A worker on the roof lets go of a hammer from the peak of the roof. Starting from rest, it slides down the entire length of the roof with a constant ...
*February 8, 2014 by Mary Anne*

**physics**

A car (m = 1670 kg) is parked on a road that rises 10.3 above the horizontal. What are the magnitudes of (a) the normal force and (b) the static frictional force that the ground exerts on the tires?
*September 29, 2011 by Anonymous*

**physics**

A car (m = 1540 kg) is parked on a road that rises 18.9 above the horizontal. What are the magnitudes of (a) the normal force and (b) the static frictional force that the ground exerts on the tires?
*February 19, 2012 by Shelby*

**Physics**

A car (m = 1510 kg) is parked on a road that rises 12.6 above the horizontal. What are the magnitudes of (a) the normal force and (b) the static frictional force that the ground exerts on the tires?
*December 12, 2012 by shine*

**physics**

A car (m = 1870 kg) is parked on a road that rises 12.1 above the horizontal. What are the magnitudes of (a) the normal force and (b) the static frictional force that the ground exerts on the tires?
*August 12, 2015 by kat*

**Physical Science**

The static frictional between a 500 kilogram box of bricks and the floor is 500 Newtons. The kinetic frictional force in only 220 Newtons. How many Newtons of force must a worker exert to get the moving?
*September 26, 2012 by Tala*

**Physics**

A 20 kg wagon is pulled along the level ground by a rope inclined at 30 deg above horizontal. A frictional force of 30 N opposes the motion, how large is the pulling force if the wagon is moving at constant velocity?
*August 22, 2014 by JOSH*

**Physics**

A 20 kg wagon is pulled along the level ground by a rope inclined at 30 deg above horizontal. A frictional force of 30 N opposes the motion, how large is the pulling force if the wagon is moving at constant velocity?
*August 22, 2014 by YESHA*

**PHYSICS**

A 20 kg wagon is pulled along the level ground by a rope inclined at 30 deg above horizontal. A frictional force of 30 N opposes the motion, how large is the pulling force if the wagon is moving at constant velocity.
*August 23, 2014 by Mae*

**Science--Physics--check answers**

1. A football player pushes a dummy forwards at a constant 0.85m/s for 11m using 7150 J of energy. The dummy has a mass of 120 kg. Find the force the football player exerts, find the frictional force the dummy exerts. - for my answer I got 1176N as the force the football ...
*February 3, 2014 by Diane*

**Physics**

A Mercedes-Benz 300SL (m = 1700 kg) is parked on a road that rises 15 above the horizontal. What are the magnitudes of (a) the normal force and (b) the static frictional force that the ground exerts on the tires?
*November 13, 2009 by Litany*

**physics**

a force F pushes on a box of mass m that initially is at rest on a rough, horizontal surface. the force F is directed at an angle theta = 30 degreees above the horizontal. the coefficants of friction between the plane and the box are static= .30 and kinetic = .28. if F=50N and...
*February 17, 2012 by Matt*

**physics**

a worker lays a rubber handled 0.500kg hammer down a sloped roof. it slides down the roof to a level portion of the roof where it slides another 2.oo m long this horizontal surface. the coefficient of friction between the rubber handle and the shingles is 0.850 a)draw free ...
*January 12, 2013 by teed*

**Physics**

A wooden block of mass m = 9 kg starts from rest on an inclined plane sloped at an angle θ from the horizontal. The block is originally located 5m from the bottom of the plane. If the block, undergoing constant acceleration down the ramp, slides to the bottom in t = 2 s, ...
*February 3, 2013 by Mike*

**physics**

A block at rest. The coefficients of static and kinetic friction are .75(Static) and .64(Kinetic). The acceleration of gravity is 9.8m/s^2 and the mass is 46kg. I've solved for the frictional force which is, 252.0841609N. Though what is the largest angle which the incline can ...
*December 14, 2014 by allan*

**trigo**

please po help me. A chimney projects 6 feet above the roof. At a point 10 feet 8 inches down the roof from the base of the chimney,the chimney subtends an angle of 1740' . find the angle at which the roof is inclined to the horizontal.
*November 4, 2015 by sam*

**Physics**

A dock worker applies a constant horizontal force of 80.0N to a block of ice on a smooth horizontal floor. The frictional force is negligible. the block starts from rest and moves 11.0 m in the first 5.00s what is the mass of the block of ice?
*June 10, 2009 by Sarah*

**Physics**

A dock worker applies a constant horizontal force of 80.0N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves 10.0m in the first 6.00s. What is the mass of the block of ice?
*October 2, 2013 by Shelby*

**science**

a worker pushes a box with a horizontal force of 50 N over a level distance of 5m. If a frictional force of 43 N acts on the box in a direction opposite to that of the worker, what was the net work done to the box?
*March 6, 2011 by KayKay*

**physices**

A man stands on the roof of a building of height 13.8 and throws a rock with a velocity of magnitude 29.3 at an angle of 34.8 above the horizontal. You can ignore air resistance
*April 8, 2011 by wala'a sami*

**Physics**

A solid sphere of uniform density starts from rest and rolls without slipping a distance of d = 3.4 m down a q = 29 incline. The sphere has a mass M = 3.7 kg and a radius R = 0.28 m. What is the magnitude of the frictional force on the sphere? --The other person did this for ...
*April 9, 2010 by rufy*

**Physics Help Please!!!!**

A car is at rest on a horizontal road. What is the value of the frictional force? Explain your answer. A bison stands at rest on the horizontal ground. What is the value of the frictional force? Explain. The normal force always has a direction perpendicular to the surface that...
*October 9, 2014 by Tom*

**Physics**

A man stands on the roof of a 19.0 m-tall building and throws a rock with a velocity of magnitude 24.0 m/s at an angle of 38.0 degrees above the horizontal. You can ignore air resistance. Calculate the maximum height above the roof reached by the rock. got it.... 11.1 m ...
*September 16, 2006 by Josh*

**Physics(Help!!!!)**

A person of mass m2= 85.0 kg is standing on a rung, one third of the way up a ladder of length d= 3.0 m. The mass of the ladder is m1= 15.0 kg, uniformly distributed. The ladder is initially inclined at an angle θ= 35.0∘ with respect to the horizontal. Assume that there is ...
*December 9, 2013 by keitanako*

**trigonometry**

A carpenter is building a house. He is constructing the roof. The roof has an angle of elevation of 40 from the horizontal. The height he wants to make the roof is 18 feet. How far is it from the bottom edge of the roof to the top of the roof? (Find the hypotenuse to the ...
*October 18, 2012 by rose*

**Physics**

A Force,F=10N,applied at an angle of 37 degree above the horizontal,moves a crate a distance of 5m along a rough horizontal surface.A frictional force of 5N opposes the motion.what is the change in kinetic energy?
*February 18, 2011 by Joel*

**physics**

Two masses are connected by a string. Mass A is on a flat roof and mass B is hanging over the edge of the roof. The mass on the roof is 15 kg and the hanging mass is 5 kg. The edge of the roof is 100 m above the ground. The two masses are initially at rest with the hanging ...
*November 18, 2010 by Anna*

**Physics**

A box has a weight of 120 N and is being pulled across a horizontal floor by a force that has a magnitude of 100 N. The pulling force can point horizontally, or it can point above the horizontal at an angle θ. When the pulling force points horizontally, the kinetic ...
*October 11, 2015 by Erne*

**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?
*July 16, 2010 by john*

**Physics**

A solid ball is released from rest and slides down a ramp that makes an angle of 50 degrees with respect to the horizontal. a) What is the minimum coefficient of static friction between the ramp and the ball for no slipping to occur? b) Would this coefficient of static ...
*November 17, 2015 by Zack*

**ap Physics**

1. a)A 15.6 kg block is dragged over a rough, horizontal surface by a constant force of 72.2 N acting at an angle of angle 34.8 above the horizontal. The block is displaced 24.6 m and the coefficient of kinetic friction is 0.234.Find the work done by the 72.2 N force.The ...
*February 26, 2011 by jeff*

**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 ...
*May 21, 2007 by micole*

**physics**

In the figure below, a solid cylinder of radius 12 cm and mass 11 kg starts from rest and rolls without slipping a distance L = 6.0 m down a roof that is inclined at angle = 30. (a) What is the angular speed of the cylinder about its center as it leaves the roof? 1 rad/s (b...
*January 5, 2011 by Joey*

**Physics**

he weight of the block in the drawing is 77.0 N. The coefficient of static friction between the block and the vertical wall is 0.490. (a) What minimum magnitude of the force is required to prevent the block from sliding down the wall? (Hint: The static frictional force exerted...
*November 7, 2013 by Samantha*

**Science**

A 110.0 kg box is pushed by a horizontal force F at constant speed up a frictionless ramp which makes an angle of 35.0 deg with the horizontal. Find the magnitude of the applied force F.
*October 26, 2011 by Mark*

**physics**

A man stands on the roof of a 19.0 m-tall building and throws a rock with a velocity of magnitude 30.0 m/sat an angle of 42.0 degrees above the horizontal. You can ignore air resistance. Calculate the maximum height above the roof reached by the rock. Calculate the magnitude ...
*September 14, 2009 by lina*

**Physics Classical Mechanics**

A person of mass m2= 85.0 kg is standing on a rung, one third of the way up a ladder of length d= 3.0 m. The mass of the ladder is m1= 15.0 kg, uniformly distributed. The ladder is initially inclined at an angle θ= 35.0∘ with respect to the horizontal. Assume that ...
*November 26, 2013 by A*

**Physics**

A dockworker applies a constant horizontal force of 79.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 13.0 m in a time 4.50 s. What is the mass of the block of ice?If the worker stops ...
*January 31, 2011 by Jake*

**Physics**

A dockworker applies a constant horizontal force of 79.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 13.0 m in a time 4.50 s. What is the mass of the block of ice?If the worker stops ...
*January 31, 2011 by Jake*

**physics**

a warehouse worker pulls on the handles of a 96.0 kg cart witha net force of 128N an angle of 55.0 degrees above the horizontal. Attached to the cart is a smaller cart having a mass of 72.0kg. What is the magnitude of the horizontal acceleration of the less massive cart?
*May 24, 2010 by julie *

**Physics**

A dockworker applies a constant horizontal force of 73.0N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 11.5m in a time 5.40s . a.) What is the mass of the block? b.)If the worker stops ...
*February 7, 2014 by Mike*

**Physics**

A 4.2 10^3 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 18.4◦ with the horizontal. An average frictional force of 4.110^3 N impedes the cars motion so that the cars speed at the bottom of the driveway is 4.9 m/s. The ...
*December 12, 2012 by alice*

**Physics**

A 3.66 kg block is placed on an inclined surface that makes an angle of 18.5 relative to horizontal. The coefficients of static and kinetic friction between the block and surface are 0.534 and 0.239, respectively. The block remains at rest when released. What is the magnitude...
*May 10, 2012 by Anonymous*

**Physics**

A man stands on the roof of a 10.0 -tall building and throws a rock with a velocity of magnitude 30.0 at an angle of 38.0 above the horizontal. You can ignore air resistance. Calculate the horizontal distance from the base of the building to the point where the rock strikes ...
*February 6, 2008 by Ava*

**physics**

A man stands on the roof of a 10.0 -tall building and throws a rock with a velocity of magnitude 30.0 at an angle of 34.0 above the horizontal. You can ignore air resistance. Calculate the horizontal distance from the base of the building to the point where the rock strikes ...
*February 21, 2012 by Rei*

**physics**

A man stands on the roof of a 10.0 -tall building and throws a rock with a velocity of magnitude 30.0 at an angle of 34.0 above the horizontal. You can ignore air resistance. Calculate the horizontal distance from the base of the building to the point where the rock strikes ...
*February 21, 2012 by Rei*

**physics**

a man stands on the roof of a 15.0m tall building and throws a rock with a velocity of magnitude 30.0m/s at an angle of 33 degrees above the horizontal. ignoring resistance calculate the horizontal distance from the base of the building to the point where the rock strikes the ...
*June 27, 2014 by kristen*

**science**

A man stands on the roof of a building of height 15.8m and throws a rock with a velocity of magnitude 25.2m/s at an angle of 32.7∘ above the horizontal. You can ignore air resistance. Part A Calculate the maximum height above the roof reached by the rock. y = 9....
*March 2, 2014 by sanele*

**physics**

A man stands on the roof of a 19.0 m tall building and throws a rock with a velocity of magnitude 30.0 m/s at an angle of 30.0 degrees above the horizontal. Ignore air resistance. Calculate the horizontal distance from the base of the building to the point where the rock ...
*September 14, 2011 by Meghan*

**Physics**

A block of mass 35kg is on a flat floor with a static friction coefficient of 0.36 and a kinetic friction coefficient of 0.29. A person attempts to slide the box from rest in a forward direction . Find the maximum frictional force experienced and the acceleration of the box ...
*November 4, 2015 by Gabb*

**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...
*May 21, 2011 by sarah*

**physics**

a man stands on the roof of a building that is 30m tall and throws a rock with a velocity of magnitude of 40m/s at an angle of 33 degress a bove the horizontal. Calculate the following: a.) The maximum height above the roof reached by the rock. b.) The magnitude of the ...
*February 7, 2013 by jm*

**Physics**

A 100 lb block of ice slides down an incline 5.0 ft long and 3.0 ft high. A worker pushes up on the ice parallel to the incline so that it slides down at constant speed. The coefficient of friction between the ice and incline is 0.10. Find the force exerted by the worker. (I'...
*March 11, 2015 by N*

**physics**

A child pulls on a wagon handle at an angle 37 above the horizontal with a force of 45 N. If the wagon accelerates at 8.1 m/s2 horizontally, what is the mass of the wagon? Assume frictional forces are negligible.
*February 13, 2011 by anonymous*

**phy**

(Q1)A 40N force applied at an angle of 37c above the horizontal pulls a 5kg box on a horizontal floor. The acceleration of the box is 3m/s2,How large a frctional force must be retarding the motion of the box. (a)50 N(b)13N(c)17N(d)25N (Q2) A block of mass 2kg is connected to a...
*July 6, 2013 by ikye*

**Physics**

What is the horizontal component of the force of an object sloped at a 45 angle. pulling with a force of 110N.
*November 12, 2014 by anon*

**physics**

A 2.9 103 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 16.0 with the horizontal. An average frictional force of 4.2103 N impedes the cars motion so that the cars speed at the bottom of the driveway is 4.6 m/s. The acceleration of ...
*November 29, 2011 by Matt*

**calculus**

The force F (in Newtons) required to move a box of mass m kg in motion by pulling on an attached rope is F(x) = f m g/(cos(x))+ f (sin(x)) where x is the angle between the rope and the horizontal, f is the coefficient of static friction and g = 9.8 m/s^2. Find the angle x that...
*November 14, 2011 by nate*

**math**

The force F (in Newtons) required to move a box of mass m kg in motion by pulling on an attached rope is F(x) = f m g/(cos(x))+ f (sin(x)) where x is the angle between the rope and the horizontal, f is the coefficient of static friction and g = 9.8 m/s^2. Find the angle x that...
*November 17, 2011 by ali*

**physics**

A 3.1 103 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 19.5◦ with the horizontal. An average frictional force of 4.4103 N impedes the cars motion so that the cars speed at the bottom of the driveway is 4.9 m/s. The acceleration...
*October 17, 2013 by Anonymous*

**Physics**

A 4.0 103 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 19.6◦ with the horizontal. An average frictional force of 4.0103 N impedes the cars motion so that the cars speed at the bottom of the driveway is 4.9 m/s. The acceleration...
*December 6, 2013 by Artemis*

**Physics`**

A field hockey player's arm and stick form a rigid segment. Assuming she hits the ball when the stick is vertical, which of the following would result in the greatest velocity of the end of her stick immediately before she hits the ball? a) She stands still and swings her arm/...
*November 25, 2013 by Caitlin*

**Physics**

After delivering his toys in the usual manner, Santa decides to have some fun and slide down an icy roof. The roof is 7 m in length and makes an angle of 41 with the horizontal. He starts from rest at the top of the roof and accelerates at the rate of 3.9 m/s2. The edge of ...
*May 25, 2012 by Tina*

**Physics**

You lose your footing and slide of of your roof. Fortunately, you have placed a safety net whose center is positioned at a horizontal distance of 4.15m, measured from a point directly below the edge of the roof- and indeed you land in the center of the net. If the roof slopes ...
*October 19, 2009 by Bill*

**physic 1**

A Mercedes-Benz 300SL (m = 1700 kg) is parked on a road that rises 15 degrees above the horizontal. What are the magnitudes of (a) the normal force and (b) the static frictional force that the ground exerts on the tires? Important: Assume that the road is higher up to the ...
*February 13, 2014 by Anonymous*

**physics**

A Mercedes-Benz 300SL (m = 1700 kg) is parked on a road that rises 15 degrees above the horizontal. What are the magnitudes of (a) the normal force and (b) the static frictional force that the ground exerts on the tires? Important: Assume that the road is higher up to the ...
*February 18, 2014 by Anonymous*

**Physics**

Two blocks (on top of one another), each of mass m = 2.4 kg, are pushed along the horizontal surface of a table by a horizontal force of magnitude 6.8 N, directed to the right. The blocks move together to the right at constant velocity. (a) Find the frictional force exerted on...
*September 27, 2011 by Kellie *

**Trigonometry**

The advertisement for a new shoe promises runners less slip. The coefficient of friction (μ) between concrete and a new material used in the sole of this shoe is 1.5. The force of friction that causes slip is equal to mg sinθ, where m is a runners mass and g is the ...
*June 24, 2010 by Mary*

**AP PHYSICS**

A 2.30 102 N force is pulling an 80.0 kg refrigerator across a horizontal surface. The force acts at an angle of 21.0 above the surface. The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 7.00 m. Find the work done by the kinetic frictional...
*November 14, 2010 by Ashley*

**Physics**

A dock worker applies a constant horizontal force of 79.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves 11.0 m in the first 6.00 s. What is the mass of the block of ice? Work done = final kinetic ...
*September 19, 2006 by Veronica*