At time t=0t = 0t=0, two blocks are stationary on a frictionless horizontal table with a compressed spring held between them. The spring is then released, pushing the blocks apart.
At a later time ttt, the blocks are moving in opposite directions while the spring has returned to its relaxed length.
What happens to the total kinetic energy and the total momentum of the two-block system between time 0 and time ttt?
Total kinetic energy changes; total momentum changes
Total kinetic energy changes; total momentum remains the same
Total kinetic energy remains the same; total momentum changes
Total kinetic energy remains the same; total momentum remains the same
78 exam-style questions on CIE IGCSE Physics Momentum, covering Momentum. Each one has a worked solution and a mark scheme showing where the marks go.