The platter of the hard drive of a computer rotates at 7200 rpm. What is the angular velocity of the platter in rad/s? How many seconds does it take to turn 20 degrees?
a) 753.98 rad/s, 0.008 seconds
b) 754.33 rad/s, 0.007 seconds
c) 752.89 rad/s, 0.008 seconds
d) 751.45 rad/s, 0.009 seconds
