6.) A 'Newton's Cradle' consists of 7 identical metal ballswhich are free to swing back and forth. When two are pulled backand then released, they stop after colliding elastically with theother 5 balls. The two balls on the other end then swing upwardswith the same speed as the first two balls. Using the conservationof momentum and mechanical energy, explain why only two balls moveafterwards. Use words and/or equations to explain your answer.
