Emily Muller
Chapter 10 – Rotational Kinematics and Energy
1) What is the angular speed, in rad/s, of a flywheel turning at 813.0 rpm? 85.14 rad/s
(813)(2)(pi)(1/60)
=85.14 rad/s
2) A chicken is running in a circular path with an angular speed of 1.52 rad/s. How long does
it take the chicken to complete one revolution? 4.13 s
(2)(pi/1.52)
=4.13 s
3) When a fan is turned off, its angular speed decreases from 10 rad/s to 6.3 rad/s in 5.0 s.
What is the magnitude of the average angular acceleration of the fan? 0.74 rad/s2
(10-6.3)/(5)
=0.74 rad/s2
