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Elastic Collisions and Recoil (The anti-collision)

Elastic Collisions and Recoil (The anti-collision). DN. What is the difference between an elastic and an inelastic collision? What does it mean that “momentum is conserved” before, during and after a collision? What is the momentum of a 16,000 kg train traveling at 10 m/s?

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Elastic Collisions and Recoil (The anti-collision)

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  1. Elastic Collisions and Recoil (The anti-collision)

  2. DN • What is the difference between an elastic and an inelastic collision? • What does it mean that “momentum is conserved” before, during and after a collision? • What is the momentum of a 16,000 kg train traveling at 10 m/s? • What is the impulse required to cause the train to stop in 20 seconds?

  3. Speed is decreasing and then increasing, car is moving in positive direction and then in a negative direction. A= (-14m/s / 1s)= -14m/s2 Constant velocity of 6 m/s Velocity is increasing, car is moving in positive direction. Acceleration is: (6m/s / 1s)= 6m/s2

  4. Example 1: A 0.5 kg billiard ball moving at 2 m/s hits another 0.5 kg billiard ball at rest. The second billiard ball begins to move away from the first with a velocity of 1 m/s. What is the new speed of the first ball?

  5. Example 3: A 3 kg rifle which it initially at rest contains a bullet with a mass of 0.03kg. The bullet is fired from the rifle at a speed of 300m/s toward the east. What is the recoil velocity of the rifle?

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