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Homework Help: Apply the law of conservation of energy to determine the ball's speed

  1. Nov 4, 2005 #1
    What formula would I use to solve for a and b?

    A 0.20-kg ball is held at rest 2.2 m above the ground, and then it is dropped. Apply the law of conservation of energy to determine the ball's speed after it has fallen (a) 1.1 m and (b) 2.2 m. Ignore air resistance.

    Answers
    (a) 4.6 m/s
    (b) 6.6 m/s

    So How would I get these answers?

    Thanks
     
  2. jcsd
  3. Nov 4, 2005 #2

    Chi Meson

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    You use two formulas; the one ofr gravitational potential energy and the one for kinetic energy.
     
  4. Nov 4, 2005 #3
    have a look at this thread
     
  5. Nov 4, 2005 #4
    Okay Thanks. I will do that
     
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