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A ball of mass mm, moving with a speed 2...

A ball of mass m`m`, moving with a speed `2upsilon_(0)`, collides inelasticaly `(egt0)` with an identical ball at rest. Show that `(a)` For head - on collision, both the balls move forward.
(b) For a genergcollision, the angle between the two velocities of scattered balls is less that `90^(@)`.

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