## Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

(a) $\omega = 4.7~rad/s$ (b) The period is 1.3 seconds.
(a) $\omega = (45~rpm)(\frac{2\pi~rad}{1~rev})(\frac{1~min}{60~s})$ $\omega = 4.7~rad/s$ (b) $P = \frac{2\pi~rad}{4.7~rad/s}$ $P = 1.3~s$ The period is 1.3 seconds.