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balls and stuff

  • 15-11-2011 8:43pm
    #1
    wastewater
    Registered Users, Registered Users 2 Posts: 24 ✭


    years ago I was told that when you hit a ball the maximum speed of the ball can only be up to twice the speed of what your are hitting the ball with, is this true


Comments

  • #2
    ray giraffe
    Registered Users, Registered Users 2 Posts: 338 ✭✭ray giraffe


    wastewater wrote: »
    years ago I was told that when you hit a ball the maximum speed of the ball can only be up to twice the speed of what your are hitting the ball with, is this true

    Yes, that is correct - if the ball is not moving when you hit it.

    [If the ball was moving towards you when you hit it and the bat was moving slow, the ball could end up moving more than twice as fast as the bat.]

    If the collision is perfectly elastic, the speed at which the bat approaches the ball equals the speed of separation of the ball and bat. Then the ball gets a speed of double the bat's speed.

    If the collision is inelastic (as in reality) the ball will end up going slower than double the bat's speed.


  • #3
    wastewater
    Registered Users, Registered Users 2 Posts: 24 ✭wastewater


    that's that sorted
    cheers!


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