A Puck with a Mass M₁ = 28

question 60

Multiple Choice

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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