A(n) 83 kg fisherman jumps from a dock into a 139 kg rowboat at rest on the west side of the dock. if the velocity of the fisherman is 3.1 m/s to the west as he leaves the dock, what is the final velocity of the fisherman and the boat? answer in units of m/s.

here we can say that there is no external force on fisherman and dock

so here we will use momentum conservation theory

As per momentum conservation

initial momentum of fisherman + boat = final momentum of fisherman + boat

now we will have

so the speed of boat and fisherman will be 1.16 m/s