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Mechanical Energy

  1. Feb 28, 2005 #1
    How much work was required to push a 36 kg box from the bottom of a ramp a distance of 10 m to the top of 1.7 m above the ground if the friction force between the box and the ramp is 20 N? Help? Formulas?
     
  2. jcsd
  3. Feb 28, 2005 #2

    Doc Al

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    Staff: Mentor

    To push the box up the ramp required:
    (1) work against gravity (which equals the increase in gravitational potential energy).
    (2) work against friction (think W = Force x Distance).

    Figure these two out and add them to find the total work required.
     
  4. Feb 28, 2005 #3
    The 20 N friction force is the part I'm unsure about.
     
  5. Feb 28, 2005 #4

    Doc Al

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    Staff: Mentor

    You know the force needed to overcome the friction (20 N). So over what distance do you have to push against friction in raising the box?
     
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