Jammie K.

A stationary 100-kg person is initially holding a 50-kg ball while standing on a skateboard. The person throws the ball to the right, and the ball moves (with respect to the ground) with a speed of 12 m/s. The person on the skateboard ____________. A. mov...

When a falling firecracker explodes, the momenta of its pieces _______. A.vectorally add to equal the initial momentum of the firecracker B. are conserved only if the fragments eject in one direction C.illustrate a case in which momentum is not conserved...