D. When Alan's puck is moving at 21 m/s south, it collides with an ice skate of mass 2 kg sitting on the rink. Alan's puck bounces backward at a speed of 4 m/s. What is the momentum of the puck-skate system

D. When Alan's puck is moving at 21 m/s south, it collides

with an ice skate of mass 2 kg sitting on the rink. Alan's
puck bounces backward at a speed of 4 m/s. What is the
momentum of the puck-skate system before the collision?

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D. When Alan's puck is moving at 21 m/s south, it collides with an ice skate of mass 2 kg sitting on the rink. Alan's puck bounces backward at a speed of 4 m/s. What i…

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