[Solved] A 2.8 kg box sliding at 34.7 m/s along a horizontal, frictionless surface comes to a rough incline that makes an angle of 36.7o with the horizontal

1. A 2.8 kg box sliding at 34.7 m/s along a horizontal, frictionless surface comes to a rough incline that makes an angle of 36.7o with the horizontal. The box slides 9.5 m up along the surface of the incline, and comes to rest. Find the work done by friction on the box, in J.

2. A 524 g rubber ball is dropped from height 9.66 m, hits the ground, and rebounds upward. If during the interaction with the ground it loses 1/7.23 of its energy, how high will the ball rise, in m, before coming momentarily to rest?

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Answer to A 2.8 kg box sliding at 34.7 m/s along a horizontal, frictionless surface comes to a rough incline that makes an angle of 36.7o with the horizontal….