Carts A and B are identical in all respects before the colli…

Questions

Cаrts A аnd B аre identical in all respects befоre the cоllisiоn.   Diagram (i): Cart A starts from rest on a hill at a height h above the ground. It rolls down and collides “head-on” with cart B which is initially at rest on the ground. The two carts stick together.   Diagram (ii): Carts A and B are at rest on opposite hills at heights h/2 above the ground. They roll down, collide “head-on” with each other on the ground and stick together.          Which of the following statements is true about the two-cart system just after the carts collide in the two cases?   Just after the collision,