Ch. 6 Momentum and Impulse

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Ch. 6 Momentum and Impulse
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Collisions

• Two objects collide and momentum is transferred
  between them
• Two types
• Elastic
• Inelastic

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Elastic Collisions

• Two objects collide and move separately
• m1v1i m2v2i m1v1f m2v2f
• 1st object 2nd object
  1st object 2nd object
• initial initial
  final final
• momentum momentum
  momentum momentum

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• A 0.215 kg golf club is swung with a speed of
  55.0 m/s and strikes a 0.046 kg golf ball at
  rest. After the collision, the club travels at a
  speed of 43.0 m/s. What is the speed of the golf
  ball just after the impact?

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Inelastic Collision

• Two objects collide and stick together
• m1v1i m2v2i (m1 m2)vf
• 1st object 2nd object
  (1st object 2nd object)
• initial initial
  final
• momentum momentum
  momentum

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• A 0.25 kg arrow with a velocity of 12 m/s to the
  west strikes the center of a 6.9 kg target.
  What is the final velocity of the combined mass?

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• A 90.0 kg fullback moving south with a speed of
  5.0 m/s has an inelastic collision with a 95.0 kg
  opponent running north at 3.0 m/s. What is the
  velocity of the players just after impact?

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