A Wheel Rotates About a Fixed Axis with an Initial

question 48

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

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