Impact And Collision

Impulse and Momentum

Impulse:

  • Vector quantity that measures the change in momentum
  • Equals the product of net force applied and time
  • Measured in newton-seconds (N·s)

Elastic and Inelastic Collisions

Elastic: Kinetic energy of system conserves

Inelastic Collision*- Part of the System´s kinetic energy dissipates into different energy types (heat, sound)

Coefficient of Restitution

  • Measures collision elasticity
  • Ratio of velocity of post-collision objects & their pre-collision velocity
  • Coefficients:0 (inelastic)<–>1(elastic)

Conservation of Momentum

  • States sum of momenta from a closed system’s items stays constant.


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