A uniform 2.45kg spinning disk with a radius of 0.243m is brought to rest by a brake pad pressed against the side 0.183m from the rotation axis. The wheels is brought to rest from an angular velocity of 15.4rad/s in a time of 24.3s. What frictional force was applied by the brake pad.
mass m = 2.45 kg
radius R = 0.243 m
distance of th brake from the rotation axis r = 0.183 m
initial angular velocity wo = 15.4 ...
This solution includes three steps of calculations.