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Homework Help: Using the momentum of the ball to find it's original height

  1. Jan 16, 2009 #1
    A 0.150 kg ball is dropped from rest. If the magnitude of the ball's momentum is 0.780 kg·m/s just before it lands on the ground, from what height was it dropped?
     
  2. jcsd
  3. Jan 17, 2009 #2

    hage567

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    Homework Helper

    What have you tried? What equations do you think you might need? You must show some effort in order to get help.
     
  4. Jan 17, 2009 #3
    i used kg m/s / kg

    .78/.15=5.2

    m/s /g

    5.2/9.8= .53

    1/2 g (m/s /g)^2=m

    1/2x9.8x.53^2=1.38

    it said that i got it right
     
    Last edited: Jan 17, 2009
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