A flywheel has an initial angular velocity of 27.2 rad/s. The flywheel is slowing down at the rate -0.70 rad/s^2. What is the total angular displacement of the flywheel in radians as it comes to rest?

The answer is a 0.64 volts

The answer would be a

Answer(a)   the matererials that are in contact, the two materials and the nature of their surfaces/// (b)/// the force pushing the two surfaces together, pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other