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Question

A ball of mass m moving with speed v collides perfectly inelastically with another ball of mass m at rest. The magnitude of impulse imparted to the first ball is

Joshi sir comment

inelastic collision means velocity of both ball will be same after collision

so by momentum conservation mv = 2mv' so v' = v/2

now initial momentum + impulse imparted = final momentum

mv + I = mv/2

so I = -mv/2

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