Koppel (or moment) is a rotational force that causes angular acceleration. It equals force multiplied by the perpendicular distance (radius arm) from the axis: τ = F × r.

Why does distance matter in torque?

The further the force is applied from the axis, the greater the torque produced. A small force at a large distance can produce the same torque as a large force at a small distance.

What if force is not perpendicular?

If force is applied at an angle θ to the radius, multiply by sin(θ): τ = F × r × sin(θ).

Koppel Calculator

Gratis torque calculator for rotational mechanics. Bereken torque (N·m) from force (N) and distance (m), or solve for force/distance given torque. Includes angular momentum, rotational inertia concepts.

Solve for torque from force and distance, or vice versa using τ = F × r.

τ = F \times r

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