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What is Torque?

Highlighted from a real textbook passage. Explained by Clicked.

Used in a sentence

University Course Reader · STEM

The net torque about the pivot must equal zero for the beam to remain in rotational equilibrium.

The reader highlighted one word in a textbook passage. Clicked explained the concept “torque” in plain language:

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Overview

Torque is twisting force — what it takes to rotate something around a pivot. It equals the force applied times the distance from the pivot: same push, farther out, more torque. That's why door handles sit on the far edge, away from the hinges.
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Overview

Torque = push × distance from the hinge. Shove a door next to its hinges and it barely moves; flick the handle with one finger and it swings open. The distance was doing the heavy lifting all along. 😎

A quick take — often all you need.

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Detail

Torque = force × distance from the pivot, and both factors count equally, so doubling the push doubles the torque and pushing twice as far out doubles it too, which is why a longer wrench turns a bolt a shorter one can't. One condition: only the part of the force pointing across the arm creates rotation, so pushing straight along a wrench toward the bolt produces zero torque. Balance works by comparing torques, since on a see-saw each side contributes force × distance, so a 40-pound child sitting far out balances an 80-pound child at half the distance. When the torques on an object cancel, it doesn't rotate, and engineers call this rotational equilibrium, using it to check that shelves, cranes and beams won't tip. The unit is the newton-meter: force times distance, literally.
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Detail

Two dials: how hard, and how far out. A longer wrench doubles your power with zero gym visits — that's why steering wheels are wide and door handles live as far from the hinge as possible. The trap is direction: only pushing across the arm counts, so push straight at the bolt and physics awards you nothing — max effort, zero rotation, everyone watching. See-saws are just the math with seats: force × distance vs force × distance, so the little kid way out beats the big kid sitting close. The see-saw doesn't respect size. It respects the product. 😎

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Analogy

A mechanic meets a rusted bolt her wrench can't move, so instead of pushing harder she slides a meter of steel pipe over the handle and pushes from the end — same muscles, but the force acts three times farther from the bolt, so it twists three times harder, and the bolt gives. Mechanics call the pipe a cheater bar, which is unfair. It isn't cheating; it's the formula.
Deepest level reached.
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Analogy

The stubborn jar lid: bare hands fail because your grip slips (losing force) on a tiny lid (no distance). Now watch the kitchen hacks expose the formula — the rubber gripper keeps your force, and the long-handled jar-opener gadget buys distance. Every jar trick ever invented is the torque equation going shopping.
Deepest level reached.

Unfamiliar concept? A real-world example makes it click — fresh analogies on tap.

AI explanations may contain errors · Not professional advice

Formal definition — The same term, explained the usual way

Torque, or moment of force, is the rotational analogue of force, defined as the cross product of the position vector and the applied force, with magnitude rFsinθ and SI units of newton-meters. Net torque produces angular acceleration proportional to the body's moment of inertia, while rotational equilibrium requires the sum of torques about any axis to vanish.

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