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
Answer: B
Physics & Space Science
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