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?
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
Well good for you. But you should have learned it in middle school.
2500 * 25 = 130000J
