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Momentum - Bull + Ball

  1. Nov 8, 2008 #1

    a charging bull elephant with mass of 5230 kg comes directly towards you with a speed of 4.45 m/s. you toss a 0.150 kg rubber ball at the elephant with a speed of 7.91 m/s. When the ball bounces back to you what is its speed?

    not too sure about how to approach this question.. thanks!
  2. jcsd
  3. Nov 9, 2008 #2


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    Homework Helper

    Hi vortec135,

    You've said it is an elastic collision. What is conserved in an elastic collision? What two equations are used in this case?
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