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One pool ball colliding

publish date2023/06/18 06:08:00 GMT+10

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Consider the simple case of one pool ball colliding head-on with another at rest.  Before the collision, the system's total momentum is the product of the mass of the moving ball and its velocity.  Those of you who have played pool know what happens after such a collision:  the ball that has been moving stops, and the other ball moves forward.  The conservation of momentum can tell us what the speed of that second ball must be.

  1. Assuming their masses to be the same, how does the momentum of the second ball after collision compare to that of the first ball before collision? (1) transparent
  2. How does the velocity of the second ball after collision, compare to the initial velocity of the first ball? (2) transparent
Please drag and drop the selected option in the right place or type it instead
They are equal
First ball is greater
Second ball is greater

Correct Answer

(1) They are equal
(2) They are equal

Reference

Basic Physics: A Self-Teaching Guide


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