A Disk with a Rotational Inertia of 5

question 22

Multiple Choice

A disk with a rotational inertia of 5.0 kg .m² and a radius of 0.25 m rotates on a frictionless fixed axis perpendicular to the disk and through its center.A force of 8.0 N is applied tangentially to the rim.If the disk starts at rest, then after it has turned through half a revolution its angular velocity is:

• A)0.57 rad/s
• B)0.64 rad/s
• C)0.80 rad/s
• D)1.6 rad/s
• E)3.2 rad/s

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