A 50. kg cart is moving across a frictionless floor at 2.0 m/s. A 70. kg child, riding in the cart, jumps off so that the child hits the floor with zero velocity. What was the velocity of the cart after the boy jumped?

Question

A 50. kg cart is moving across a frictionless floor at 2.0 m/s.  A 70. kg child, riding in the cart, jumps off so that the child hits the floor with zero velocity. What was the velocity of the cart after the boy jumped?

bobpursley · Answer

(M1+M2)V1=M1Vf+M2*0 conservation of momentum.

audrey · Answer

4.8m/s