Physics
posted by Anna .
The flywheel of a steam engine runs with a constant angular speed of 321 rev/min (in the counterclockwise direction). When steam is shut off, the friction of the bearings stops the wheel in 1.9 h.
(a) What is the constant angular acceleration, in revolutions per minutesquared, of the wheel during the slowdown?
magnitude rev/min2
direction
(b) How many revolutions does the wheel make before stopping?
rotations
(c) At the instant the flywheel is turning at 75 rev/min, what is the tangential component of the linear acceleration of a flywheel particle that is 50 cm from the axis of rotation?
magnitude mm/s2
direction
(d) What is the magnitude of the net linear acceleration of the particle in (c)?
m/s2

Please don't post under multiple names. I will be happy to critique your thinking.