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A 67.6-kg person, running horizontally with a velocity of +4.85 m/s, jumps onto a 19.1-kg sled...

A 67.6-kg person, running horizontally with a velocity of +4.85 m/s, jumps onto a 19.1-kg sled that is initially at rest. (a) Ignoring the effects of friction during the collision, find the velocity of the sled and person as they move away. (b) The sled and person coast 30.0 m on level snow before coming to rest. What is the coefficient of kinetic friction between the sled and the snow?

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Answer #1

Concept - use momentum conservation principle to find the velocity of the sled and person as they move away after collision. Then we use work energy theorem where work done by friction will be equal to change in kinetic energy. The initial kinetic energy can we found by using the speed and the final kinetic energy will be zero

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