Science · 6 pages · 12 min
Why a lever moves a heavy stone
A long effort arm lets a small force balance a large one by matching torques.
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From the opening
A lever moves a heavy stone because torque, not raw force, is what the fulcrum balances. A modest push far from the fulcrum can match a huge weight close to it, since each side is force times its distance. The opening covers torque is force times distance, why the handle must move farther, and where the fulcrum sits.
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Inside
- Torque is force times distance
- Why the handle must move farther
- Where the fulcrum sits
- What a bending bar gives up
- Where the idea stops applying
- A distinction worth keeping
Sources
- Torque balance on a lever
- Mechanical advantage paid for in distance