# Chapter 10 - Exercises and Problems - Page 184: 18

a) 725 seconds b) 21,749 revolutions

#### Work Step by Step

a) Converting rotations per minute into radians per second and then using the correct equation, we obtain: $\omega = \omega_0 +\alpha t \\377 = 0+.52t \\ t = \fbox{725 seconds}$ b) We find the change in theta: $\theta=\omega_0 t +\frac{1}{2}\alpha t^2 \\ \theta = \frac{1}{2}(.52)(725^2)=1.4\times10^5 \ rads = \fbox{21,749 revolutions}$

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.