This simulation models a system in which both momentum and mechanical energy are conserved. Two balls are dropped either side-by side or in a stacked position with initial velocity of zero. Observe how the behaviors of the two balls change with the ratio of their masses Ma/Mb. Can you explain the rebound height of the red ball using concepts of the conservation of momentum during perfectly elastic collisions and the conservation of mechanical energy?(The long rectangular box on the right displays the balls at ⅓ of their original scale.)
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