A disk initially at rest is given an angular acceleration of 12.0 rad/ s^2• What is its angular velocity after 10 s? What is its frequency then in revolutions per minute (rev/m in)? How many revolutions does it make during this time?

Question

A disk  initially at rest  is  given an  angular acceleration  of  12.0  rad/ s^2•  What is its angular velocity after 10 s?  What is  its frequency then in  revolutions per minute  (rev/m in)?  How many revolutions does  it make during this time?

irishboy123 · Answer

A) dΩ = 12 * 10 = 120rad/s

B) 120rad/s = 120*60 = 7,200rad/min = 1,146 rpm (because 2π rad = 1 rev)

C) average rpm (because of linear angular acceleration) = 573rpm. t = 1/6mins, revs = 95.5