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JEEMAIN and NEET
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Physics
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Class11
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Laws of Motion
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A ball is moving with velocity v strikes a wall moving towards the ball with velociy u. An elastic impact lasts for t seconds. Find the mean elastic force acting on the ball
\[(a)\;\frac{2m(v-u)}{t} \quad (b)\; \frac{2m(v+u)}{t} \quad (c)\;\frac{2m(v+u)}{t(v-u)}\quad(d)\;\frac{m(v+u)}{t} \]
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