I need help with Conservation Laws!

  1. The question I'm doing for homework that I can't get is...

    A spring is compressed 10.0 cm by an average force of 50.0 N. If the spring shoots a 20.0 g pebble straight up into the air, how high will it rise?

    It would be sooper awesome if you could help with this!
  2. jcsd
  3. Doc Al

    Staff: Mentor

    Where did you get stuck? Show your work to get help. (Hint: Spring PE gets transformed to Gravitational PE.)
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