1. A wheel of radius 0.2 m starts from rest at t = 0 and rotates with constant angular acceleration about its axis to an angular velocity of 12 rad/s at t = 3 s.
What is the angular acceleration of the wheel?
(a) 4 rad/s2
(b) 15 rad/s2
(c) 7.2 rad/s2
(d) 36 rad/s2
(e) 1.33 rad/s2
2. How many revolutions does the wheel make during the period of acceleration?
(a) 2.9
(b) 3.7
(c) 1.5
(d) 8.6
(e) 6.9
3. At t = 1.5 s, what is the centripetal acceleration of a point on the rim of the wheel?
(a) 4 m/s2
(b) 15 m/s2
(c) 7.2 m/s2
(d) 36 m/s2
(e) 1.33 m/s2