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Energy Problem

  1. Nov 25, 2012 #1
    1. The problem statement, all variables and given/known data
    1.2 kg cart slides down frictionless ramp from a height of 1.8m and then onto a horizontal surface where it has a head-on elastic collision with a stationary 2.0kg cart cushioned by an ideal Hooke's Law spring. Maximum compression of spring is 2.0 cm
    Determine the spring Constant


    2. Relevant equations



    3. The attempt at a solution
    Em1=Em2
    mgh=1/2kx^2
    But this did not get me the answer
     
  2. jcsd
  3. Nov 26, 2012 #2

    PeterO

    User Avatar
    Homework Helper

    Don't forget that when the spring is at maximum compression, the (previously) stationary cart has already begun to move, so only part of the Initial energy of other Cart is stored in the spring.
     
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