A Yoyo with Moment of Inertia I and Mass M

question 31

Multiple Choice

A yoyo with moment of inertia I and mass m is hung using a light string over a frictionless pulley.A force F is applied to the other end of the string.The yoyo is allowed to unwind.As the yoyo unwinds,the force needed to stop the pulley from rotating is _____ the weight mg.

• A)less than
• B)equal to
• C)greater than
• D)depends how fast the yoyo is unwinding
• E)unable to tell

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