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

Question

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

Quizplus · Accepted Answer

The Answer of 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

A Yoyo with Moment of Inertia I and Mass M