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Question
A heavy steel ball of mass greater than 1 kg moving with a speed of 2 m sec−1collides head on with a stationary ping-pong ball of mass less than 0.1 gm. The collision is elastic. After the collision the ping-pong ball moves approximately with speed
A heavy steel ball of mass greater than 1 kg moving with a speed of 2 m sec−1collides head on with a stationary ping-pong ball of mass less than 0.1 gm. The collision is elastic. After the collision the ping-pong ball moves approximately with speed
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Solution
The correct option is B
We know that when heavier body strikes elastically with a lighter body then after collision lighter body will move with double velocity that of heavier body.i.e.the ping pong ball move with speed of 2×2=4m/s
We know that when heavier body strikes elastically with a lighter body then after collision lighter body will move with double velocity that of heavier body.i.e.the ping pong ball move with speed of 2×2=4m/s