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In tae-kwon-do, a hand is slammed down onto a target at a speed of 11 m/s...

In tae-kwon-do, a hand is slammed down onto a target at a speed of 11 m/s and comes to a stop during the 7.0 ms collision. Assume that during the impact the hand is independent of the arm and has a mass of 0.90 kg. What are the magnitudes of the (a) impulse and (b) average force on the hand from the target?

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