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Posts: 3561
12 years ago
A puck with a mass m1 =  28.0 g moving at 1.00 m/s approaches a stationary puck with a mass m2 =  102 g on an air table and they undergo a two-dimensional elastic collision. As a result of their interaction, the incident puck moves away with a speed v1 = 0.785 m/s and the other puck moves away with a speed v2 in a different direction. What is the angle between the velocities  v1 and  v2?
A) 45.0°
B) 90.0°
C) 85.0°
D) 123°
E) 165°
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12 years ago
D
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