Pushing a box up an inclined plane

AI Thread Summary
To calculate the efficiency of an inclined plane for a 60-pound box being pushed up a 16-foot incline raised 4 feet high, the total work output is determined as 480 ft.lb. The efficiency formula requires both the useful work output and the total work input, but the total work input is unclear without knowing if the box is moving at a constant speed or accelerating, and whether friction is present. These factors significantly impact the calculation of total work input. Clarification on these variables is essential for an accurate efficiency assessment. Understanding these dynamics will lead to a more precise evaluation of the inclined plane's efficiency.
tuffshorty
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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 I am not sure how to get the total work input...
 
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Is the box being pushed up at a constant speed, or is it accelerating?
 
Is there friction that needs to be accounted for?
 

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