DYNAMICS OF ROTATIONAL MOTION | 6.3

Torque

quantitative measure of the tendency of a force to cause or change the rotational motion of a body

large

***force applied FAR from axis of rotation (large or small)

N*m

Torque formula / IS UNIT

Lever arm

perpendicular distance between the line of action of the force and the reference point (axis of rotation)

Line of action formula (l)

(dependes cos or sin)

Magnitude of Torque

Rotational Version of Newton’ s Second Law

The net torque on a rigid body equals the body’ s moment of inertia about the rotation axis times its angular acceleration