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a crane uses an average force of 5,200 N to lift a girder 25 M. How much work does the crane do on the girder?

Guest Feb 21, 2017
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 #1
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W = Fd 

let F represent the average force applied to the girder in your question

lets d be the displacement (or distance traveled) by the girder

 

source: I learned this in first semester of college, DC Fundemental physics

Guest Feb 21, 2017
 #2
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Well good for you. But you should have learned it in middle school.

2500 * 25 = 130000J

Guest Feb 21, 2017

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