Two carts with masses of 4.3 kg and 3.9 kg move toward each other on a frictionless track with speeds of 5.6 m/s and 5.0 m/s, respec- tively. The carts stick together after colliding head-on.

Question

Find their final speed.

Answer 1

conservation of momentum
M1*V1+M2*V2=(M1+M2)V
solve for V