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Pushing a box up an inclined plane

  • Thread starter tuffshorty
  • Start date
  • #1
11
0
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.


Homework Equations



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

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...
 

Answers and Replies

  • #2
137
4
Is the box being pushed up at a constant speed, or is it accelerating?
 
  • #3
209
1
Is there friction that needs to be accounted for?
 

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