61 kg soccer player jumps vertically upwards and heads the 0.45 kg ball as it is descending vertically with a speed of 29 m/s. If the player was moving upward with a speed of 4.0 m/s just before impact, what will be the speed of the ball immediately after the collision if the ball rebounds vertically upwards and the collision is elastic?
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I will be happy to critique your thinking, no one is going to do all this algebra for you.
It is not the algebra that is confusing it is setting up the problem
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