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Pushing a box up an inclined plane

  1. Apr 30, 2009 #1
    I need to calculate the efficiency of a inclined plane if a 60 pound box is being pushed up it... The inclined plane is 16 feet long (The plane itself, not the base) and it is raised up 4 feet high.

    2. Relevant equations

    efficiency= useful work output/total work input
    w= work
    f= force
    d= distance

    3. The attempt at a solution

    I have The total amount of work you are putting out is 480 ft.lb ... but im not sure how to get the total work input...
  2. jcsd
  3. Apr 30, 2009 #2
    Is the box being pushed up at a constant speed, or is it accelerating?
  4. Apr 30, 2009 #3
    Is there friction that needs to be accounted for?
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