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Homework Help: Kinetic energy after falling to 100m

  1. Nov 17, 2014 #1
    1. The problem statement, all variables and given/known data
    A 250 g object is dropped from a height of 150 m. What is the kinetic energy after falling to 100m

    2. Relevant equations
    V2^2 = V1^2 +2ad
    Ek = 1/2 mv^2
    3. The attempt at a solution
    I used the kinematics equation to find my v2 then I used this to find Ek. I got the answer 120J but I'm not sure if I'm doing this right
  2. jcsd
  3. Nov 17, 2014 #2
    That solution should work, alternatively you could find the change in the gravitational potential energy and equate that change to the kinetic energy.
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