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A 5.0-kg package slides 4 m down the incline of a ramp sloped at 20˚. The...

A 5.0-kg package slides 4 m down the incline of a ramp sloped at 20˚. The coefficient of kinetic friction increases linearly along the surface of the ramp, from 0 at the top to 0.32 at the bottom.

1) Calculate the work done on the package by gravity.

2) Calculate the work done on the package by friction.

3) Calculate the work done on the package by the normal force.

4) If the package had a speed of 3.7 m/s at the top of the ramp, what speed does it have at the bottom?

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