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Homework Help: Balls collision

  1. May 10, 2005 #1
    Does anyone can help me on this please?
    Ball A is dropped from the top of building at the same instant the ball B is thrown vertically upward from the ground.When the balls collide,they are moving in the same direction,and the speed of A is 4 times that of B.At what fraction of the height of the building does collision occurs?
    I will appreciate.
  2. jcsd
  3. May 10, 2005 #2
    So, where did you get stuck? Please show us your working so we can help you.
  4. May 10, 2005 #3
    Think of ways to express the paths of both balls. Maybe a kinematic equation could help or perhaps the useful K.E. equation.... [tex]K.E. = \frac{1}{2}mv^2[/tex]

    That should get you started.

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