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Conservation

Conservation. Collisions. Conservation of Linear Momentum The change in momentum of a system is equal to the impulse put on the system. Conservation of Linear Momentum For example: Jeff Bagwell hits a baseball…. Initially. Conservation of Linear Momentum

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Conservation

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  1. Conservation Collisions

  2. Conservation of Linear Momentum The change in momentum of a system is equal to the impulse put on the system.

  3. Conservation of Linear Momentum For example: Jeff Bagwell hits a baseball… Initially

  4. Conservation of Linear Momentum For example: Jeff Bagwell hits a baseball… During hit

  5. Conservation of Linear Momentum For example: Jeff Bagwell hits a baseball… Finally

  6. Two types of collisions Elastic: The objects do not stick together or change shape. Momentum and kinetic energy are conserved. Inelastic: The objects do stick together and/or change shape. Only momentum is conserved!

  7. Example of an elastic collision The cue ball hits two billiard balls initially at rest on a billiard table. Assume that the cue ball stops after hitting the other balls. What is the final velocity of the red and blue ball? y θ x

  8. y θ x

  9. y θ x

  10. y θ x We have three equations and four unknowns. We cannot solve this problem without more information. You will usually be given the speed or angle of one of the balls.

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