# physics

posted by .

A 2 kg metal plate slides down a 11-meter high slope. At the bottom its speed is 7.5 m/s. To the nearest Joule, what was the magnitude of the work done by friction?If the slope in the above problem is 22 degrees, what is the coefficient of friction?

• physics -

InitialPE-friction=final KE

solve for friction work.

Now, friction work= mu*mg*cosTheta*11meters
solve for mu.

## Similar Questions

1. ### Physics

i know this is alot to ask for but these 10 i can nott get out of the 30 A man pulls a 10-kg box across a smooth floor with a force of 71 newtons at an angle of 23 degrees and for a distance of 97 meters. How much work, to the nearest …
2. ### Physics

A man skis down a slope 120 m high. If 80 percent of his initial potential energy is lost to friction and air resistence, what is his speed at the bottom of the slope?
3. ### Physics

A skier of mass 64 kg starts from rest at the top of an 18° slope, points her skis straight down the slope and lets gravity pull her down the slope. The slope is 65 m long. Her speed at the bottom is 15 m/s. (a) Assuming zero air …
4. ### Physics

A 16-kg child sits on a 5-kg sled and slides down a 143-meter, 30-degree slope, to the nearest m/s what is his or her speed at the bottom?
5. ### physics

A 2 kg metal plate slides down a 14-meter high slope. At the bottom its speed is 11.1 m/s. To the nearest Joule, what was the magnitude of the work done by friction?
6. ### Physics

A 45 kg child sits on a 5 kg sled and slides down a 117 meter, 31 degree slope, to the nearest m/s what is his or her speed at the bottom?
7. ### Physics

A 45 kg child sits on a 5 kg sled and slides down a 117 meter, 31 degree slope, to the nearest m/s what is his or her speed at the bottom?
8. ### Physics

(a) How high a hill can a car coast up (engine disengaged) if friction is negligible and its initial speed is 96.0 km/h?
9. ### physics

A skier slides down a ski slope with an acceleration 2.2 m/s^2 directed down the slope. The coefficient of kinetic friction between the skis and the slope is 0.24. What is the angle of the slope with the ground?
10. ### physics

A skier traveling at 26.2 m/s encounters a 23 degree slope. (a)If you could ignore friction, to the nearest meter, how far up the hill does he go?

More Similar Questions