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Work,Energy and Power

  1. May 29, 2016 #1
    1. The problem statement, all variables and given/known data
    A body of mass 2 kg thrown vertically with KE of 490 joules. If the acceleration due to gravity is 9.8 m/s^2 of the body becomes half its original value is given by:

    c.25 m
    d.10 m

    2. Relevant equations
    3. The attempt at a solution

    H=25 m

    is it right ? or we have to half the value.
  2. jcsd
  3. May 29, 2016 #2


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    Science Advisor

    What is the question? The second sentence is incoherent. My best guess is that it is asking how high the body needs to go to lose half of its kinetic energy due to gravity.

    In that case, the Kinetic Energy that is lost and the Potential Energy that is gained are both half of 490 joules.
  4. May 29, 2016 #3
    yes sorry the sentence is . "the height at which the K.E of the body becomes half its original value is given by"
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