the Connection between

Angular and Linear Quantities

Tangential velocity, vt

Tangential acceleration, at

Radial acceleration, ar,

or centripetal acceleration, ac.


ar = ac = v2/r

ar = (r )2 / r

ar = r 2

The tangential acceleration at and the radial acceleration ar are two vector components of the acceleration;

Remember, these are vector components and must be added as vectors!

Rotational Kinematics

Rotational Energy
Return to ToC, Ch10, Rotation about a Fixed Axis

(c) Doug Davis, 2001; all rights reserved