Physics

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A hockey goalie is standing on ice. Another player fires a puck (m = 0.22 kg) at the goalie with a velocity of +63 m/s
(a) If the goalie catches the puck with his glove in a time of 7.0 10-3 s, what is the average force (magnitude and direction) exerted on the goalie by the puck?
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(b) Instead of catching the puck, the goalie slaps it with his stick and returns the puck straight back to the player with a velocity of +63 m/s. The puck and stick are in contact for a time of 7.0 10-3 s. Now what is the average force exerted on the goalie by the puck?

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