20. A hockey puck travels across the ice at a speed of 38 m/s
34 north of east. It has a glancing collision with a stationary
puck of the exact same mass. The previously stationary puck moves
at 33 m/s 24 north of east. What is the speed and direction of the
first puck (both pucks have a mass of 0.3 kg) after the collision?
Is the collision elastic or inelastic?
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