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 used multiplied by time taken to apply force.
1 energy x 1 time = 1 force
0.5 energy x 2 time = 1 force
The pulley reduces energy, but multiplies time by increasing the ropes length. Its the same energy used. Just a lower peak overall.
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