A 0.105 kg hockey puck moving at 24 m/s is caught and held by a 75 kg goalie at rest. With what velocity does the goalie slide one the ice after catching the puck.

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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