Question

A solid disk of mass 15kg and diameter 60cm is spinning counterclockwise in the plane of the page. The initial angular velocity of the disk is 24rad/s. If after 20 seconds the angular velocity is found to be 12 rad/s, the average torque exerted on the disk during that time has been

a) 0.405 m•N out of the page

b) 0.405 m•N into the page

c) 0.604 m•N to the right

d) 0.810m•N out of the page

e) 0.810 m•N into the page

Answer 1