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B Question About Work-Energy Theorem

  1. Apr 8, 2016 #1
    Very simple question. So I am on a homework problem, and I want to make sure that I am using this theorem correctly. My book states that the Work-Kinetic Energy Theorem is:


    Now the solution to this problem involved multiple forces and thus each force is doing work. So my question is, is it legal to say that:

    ∑W = ΔK
  2. jcsd
  3. Apr 8, 2016 #2


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    Gold Member

    Yes. Precisely.
  4. Apr 8, 2016 #3
    Thank you, the problem makes complete sense to me now!
  5. Apr 8, 2016 #4


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    Staff: Mentor

    In Newton's second law, F = ma, F is always the net force acting on an object. Therefore, in the work-energy theorem, W is always the net work done on the object.
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