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Momentum in Two Dimensions Homework

  1. Hockey puck A moves to the right at 50 m/s. It strikes an identical hockey puck B that is stationary on the ice. After the collision, the velocity of A is 35 m/s, 27.6°. What is the velocity of B? Ans: 24.97 m/s, 40.52° below the horizontal
  2. A 600 g billiard ball moving to the right at 2 m/s collides with an 800 g ball at rest. After the collision, the 600 g ball is deflected at an angle of 37į above its original direction at a rate of 0.5 m/s. What is the magnitude and direction of the 800 g ballís velocity? Ans: 1.22 m/s, 10.85° below the horizontal
  3. A 6000 kg truck traveling north at 5 m/s collides with a 4000 kg car traveling west at 15 m/s. The two remain locked together after the collision. What is their velocity after the collision? Ans: 6.71 m/s, 26.6° north of west
  4. A 1200 kg car traveling east at 60 km/h collides with a 3000 kg truck traveling north at 40 km/h. After the collision, they remain joined. What is their velocity? Answer in km/h. Ans: 33.3 km/h, 59°
  5. A 10 kg ball travels west at 4 m/s. It strikes a 12 kg ball at rest. After the collision, the velocity of the 10 kg ball is 2.5 m/s, 40° below the horizontal. What is the 12 kg ballís velocity? Ans: 2.20 m/s, 142.4°

Momentum Notes

Momentum Sample Problems

Linear Momentum and Impulse Homework