World 1 · Levers · 7 minBalancing Act
Torque and the law of the lever
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A lever balances when the torque (force × arm) on each side is equal. That is the law of the lever: effort × effort arm = load × load arm.
Check yourself
A 600 g load sits 15 cm from the fulcrum. To balance it 30 cm out, how much effort?
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