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Homework Statement
The pulley system has a mechanical advantage of 3. You want to lift the box weighing 420N 6m above the ground. You pull 18m of rope with 140N of force. What is the work done? (Ignoring the angle)
Homework Equations
Work=force*distance
The Attempt at a Solution
I thought that since the box moved 6m, and you put in 140N of force, so 6* 140= 840J of work.