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Linear Momentum Sample Problems

  1. A 4 N force acts on a 3 kg object moving at 8 m/s for 10 sec. What is the object's change in momentum? What impulse acts on the object? What is the object's final speed?
  2. A 1000 kg car traveling at 9 m/s, east, strikes a stationary 2000 kg truck. They interlock as a result of the collision and move off as one. What is their speed? What is their velocity?
  3. A 15,000 kg rocket launcher holds a 5000 kg rocket. The rocket exits the launcher at +450 m/s. What is the recoil velocity of the launcher?
  4. A 100 g ball traveling to the right at 2 m/s strikes a 200 g ball traveling to the left at 4 m/s. After the collision, the 100 g ball has a velocity of 8 m/s, left. What is the velocity of the 200 g ball?
  5. A 1200 kg car moving at 8m/s, north, strikes a 2000 kg truck moving at 4 m/s, south. The velocity of the car is 6 m/s, south. What is the velocity of the truck?

Momentum in Two Dimensions - Sample Problems

  1. A 1325 kg car traveling north at 27 m/s collides with a 2165 kg car moving east at 17 m/s. As a result of the collision, they stick together. What is their velocity after the collision?
  2. A 6 kg object A moving at 3 m/s, right, collides with a 6 kg object B at rest. After the collision, A moves at 1.6 m/s, 30 above the horizontal. What is the velocity of B after the collision?
  3. A stationary 0.14 kg ball is struck by a 0.23 kg ball moving east at 2 m/s. After the collision, the 0.14 kg ball has a velocity of 0.9 m/s, 30. What is the velocity of the 0.23 kg ball?
  4. A 0.50 kg ball at rest is struck by a 0.30 kg ball moving west at 5 m/s. After the collision, the 0.30 kg ball has a velocity of 3 m/s, 200. What is the velocity of the 0.50 kg ball?

Momentum Notes

Linear Momentum and Impulse Homework

Momentum in Two Dimensions Homework