A Yo-Yo with Moment of Inertia I and Mass M

question 48

Multiple Choice

A yo-yo 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 yo-yo 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 yo-yo is unwinding.
• E) Unable to tell.

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