To throw a ball, do you exert an impulse on it? Do you exert an impulse to catch the ball at the same speed? About how much impulse do you exert, in comparison, if you catch it and immediately throw it back again? (Imagine yourself on a skateboard.)
Added by Christopher R.
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This impulse is equal to the change in momentum of the ball, which is the product of the mass of the ball and the final velocity minus the initial velocity. Show more…
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