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A ball is moving with velocity 2ms^(-1) ...

A ball is moving with velocity `2ms^(-1)` towards a heavy wall moving towards the ball speed `1ms^9-1)` as shown in figure. Assuming collision to be elastic, find the velocity of ball immediately after the collision

Text Solution

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The speed of the wall will not change after the collision.
Let `v` be the velocity of the ball after collision in the direction shown in figure. Since collision is elastic `(e=1)`.
Speed of separation speed `=` Speed of approach
`=v-1=2+1` or `v=4m/s`
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