a 4k baseball is swung so that the velocity of the center of mass is 60 m/s the moment it hits a baseball (100 g) coming in from the exact opposite direction at 40 m/s. If the collision is perfectly head on and an elastic collision, a) what is the momentum of the bath, the ball, and the total system the moment prior to the collision? b) what would the velocity (and direction) of the bat and ball each be the moment after the bat hits the ball? (assume an elastic collision in 1-D

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