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Statement of a problem № 3153

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A body of mass M rests on a smooth table and another of mass m moving with a velocity u collides with it. Both are perfectly elastic and smooth and no rotations are set up by this collision. The body M is driven in a direction at angle f to the initial line of motion of the body m. Show that the velocity of M is 2mu cos f/(M+m)

Solution:
A body of mass M rests on a smooth table and another of mass m moving with a vel

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