A Grindstone of Radius 4

question 26

Multiple Choice

A grindstone of radius 4.0 m is initially spinning with an angular speed of 8.0 rad/s. The angular speed is then increased to 12 rad/s over the next 4.0 seconds. Assume that the angular acceleration is constant.
-Through how many revolutions does the grindstone turn during the 4.0-second interval?

• A)0.64
• B)3.8
• C)4.0
• D)6.4
• E)40

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