Cognitive Scaffold

Preparing your thinking workspace

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MENTAL MODEL · M4588

Torque

Torque
TechnicalHigh supportPhysics
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Version 1.0.0 · Updated 2026-07-28

CORE DEFINITION

In physics and mechanics, torque is the rotational correspondent of linear force. It is also referred to as the moment of force, or simply the moment. Just as a linear force is a push or a pull applied to a body, a torque can be thought of as a twist applied to an object with respect to a chosen axis. For example, when driving a screw, a screwdriver applies torque to the screw, causing it to tend to rotate.

SCAFFOLDING EFFECT

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In physics and mechanics, torque is the rotational correspondent of linear force. It is also referred to as the moment of force, or simply the moment. Just as a linear force is a push or a pull applied to a body, a torque can be thought of as a twist applied to an object with respect to a chosen axis. For example, when driving a screw, a screwdriver applies torque to the screw, causing it to tend to rotate.

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Torque τ = F × r: the rotational effect depends not only on the magnitude of the force, but also on the distance from the pivot (the lever arm). Metaphorically, the effect of influencing a system depends on the 'position' where you apply force—pushing directly against the core (short lever arm) is often futile, while applying force at the periphery that the other party cares about but has not defended (long lever arm) can leverage small effort into big changes.

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