#1

An electric motor rotating a workshop grinding wheel at a rate of 231 rev/min is switched
off. Assume constant angular deceleration of
magnitude 1.87 rad/s^2
.
Through how many revolutions does the
wheel turn before it finally comes to rest?
Answer in units of rev.

#2
At t = 0, a wheel rotating about a fixed axis at
a constant angular deceleration of 0.24 rad/s
2
has an angular velocity of 2.2 rad/s and an
angular position of 8.1 rad.
What is the angular position of the wheel
after 2 s?
Answer in units of rad.