A hockey puck with mass 0.250 kg traveling along a line at 2.5 m/s strikes a stationary puck with the same mass.One puck exits the elastic collision in a direction that is 20 degrees away from the line at a speed of 2.35 m/s.What is the speed of the second puck after the collision?
A)0.85 m/s
B)2.5 m/s
C)0.63 m/s
D)0.73 m/s
E)0.15 m/s

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The Answer of A hockey puck with mass 0.250 kg traveling along a line at 2.5 m/s strikes a stationary puck with the same mass.One puck exits the elastic collision in a direction that is 20 degrees away from the line at a speed of 2.35 m/s.What is the speed of the second puck after the collision?
A)0.85 m/s
B)2.5 m/s
C)0.63 m/s
D)0.73 m/s
E)0.15 m/s

A Hockey Puck with Mass 0