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11 July, 05:33

At the same instant that a 0.50-kg ball is dropped from 25m above Earth,? At the same instant that a 0.50-kg ball is dropped from 25m aboveEarth, a second ball, with a mass of 0.25 kg, is thrown straight upward from Earth'ssurface with an initial speed of 15m/s. They move along nearby lines and pass each other without colliding. At the end of 2.0 s the velocity of the center of mass of the two-ball system is:

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  1. 11 July, 05:51
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    I hope it is clearly visible ... Velocity of the center of mass of 2-ball system is - 11.54m/s. Minus indicates, velocity direction is in downward direction.
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