>>14386784>Where is the extra energy drawn from?There is no extra energy.
Say you are pushing with 10 pounds of force 10 feet from the fulcrum. You are lifting 100 pounds 1 foot from the fulcrum, on the opposite side. You are applying 100 pound-feet of torque on the level, and so is the load on the other end (10*10=100*1=100 lb-ft). The torques are balanced; the lever is in equilibrium; nothing is in motion.
If you just barely nudge your end of the lever an inch downward, you would be applying 10 pounds over 1 inch (10 pound-inches of energy). The 100 pound load at the other end would then be lifted 1/10 of an inch (by some basic geometry) and so its potential energy would increase by 100*1/10=10 pound-inches.
There is no free energy. Energy is conserved. Force is NOT a conserved quantity in general; it can be multiplied and divided however you like. FUCK SI.
