Where is the extra energy coming from?
If I can lift a maximum of 60kg with my bare hands, but then I can lift 300kg using pulleys/levers, where did that extra energy come from? Will I still burn calories like I am lifting 60kg or 300kg?
In: Physics
When placed correctly (assume equal size and weight distribution) the pulleys split the overall load amongst them. When you apply 50lbs of force to the unweighted side, 50lbs is applied to all pullies and total forced is added ( some pulley configurations have better input/output ratios). The more pulleys you have the more force output with same initial input.
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