Two identical carts

PHYSICS · Single correct · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

Two identical carts, each of mass 4 kg4\,\text{kg}, are on a frictionless track. Cart P moves with speed 6 m s−16\,\text{m\,s}^{-1} and collides with stationary cart Q. After the impact they stick together. What percentage of the initial kinetic energy is lost during the collision? (a) 75\% (b) 50\% (c) 33\% (d) 25\%

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