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Q.

A block of mass 0.5kg is moving with a speed of 2m/s on a smooth surface. It strikes another mass 1kg then they move together as a single body. The energy loss (in J) during the collision is __ .

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answer is 0.67.

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Detailed Solution

m1u1+m2u2=m1+m2V⇒V=23m/s

 Energy loss =12(0.5)22−12(1.5)232=0.67J

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