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
Energy/work is force times distance.
Pulleys and levers and gears all work by letting you put in less force, but over a longer distance. Basically you are spreading out the work into more manageable pieces, but it is still the same amount of work/energy.
The concept is called mechanical advantage
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