Question

PartA An old wheat-grinding wheel in a museum actually works. The sign on the wall says that the wheel has a rotational acceleration of 200 rad/s2 as its spinning rotational speed increases from zero to 900 rpm. How long does it take the wheel to attain this rotational speed? Express your answer with the appropriate units |A+ | Value Units Submit

Answer 1

Initial angular speed omega_i = 0 Final angular speed omega_f = 2 pi (1900/60) rad/s = 198.967 rad/s Angular acceleration alpha = 200 rad/s^2 Time taken t = omega_f - omega_i/alpha = 198.967 - 0/200 = 0.9948 s