A Wheel Rotates About a Fixed Axis with an Initial

Multiple Choice

A wheel rotates about a fixed axis with an initial angular velocity of 20 rad/s. During a 5.0-s interval the angular velocity increases to 40 rad/s. Assume that the angular acceleration was constant during the 5.0-s interval. How many revolutions does the wheel turn through during the 5.0-s interval?

A) 20 rev
B) 24 rev
C) 32 rev
D) 28 rev
E) 39 rev