(Solved): A 53.8kg person, running horizontally with a velocity of +3.16m/s, jumps onto a 13.7kg sled ...

A $53.8?\mathrm{kg}$ person, running horizontally with a velocity of $+3.16\mathrm{m}/\mathrm{s}$, jumps onto a $13.7?\mathrm{kg}$ 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 $30.0\mathrm{m}$ on level snow before coming to rest. What is the coefficient of kinetic friction between the sied and the snow? (a) Number Units (b) Number Units