8: A sphere, I= 0.45 kg m' and r= 8 cm, is initially rotating at 22 rad/s. You put your hand on the sphere at point P and slow the disk to 4 rad/s while it rotates 7.2 times. A: Using the work energy theorem, what is the magnitude of the applied force? Axis of rotation 30 B: Where on the sphere would to apply the force to get maximum torque. Use equations to justify your

University Physics Volume 1
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Chapter10: Fixed-axis Rotation
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Problem 91P: Suppose when Earth was created, it was not rotating. However, after the application of a uniform...
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8: A sphere, I= 0.45 kg m' and r= 8 cm, is initially rotating at 22 rad/s. You put your hand on the
sphere at point P and slow the disk to 4 rad/s while it rotates 7.2 times.
A: Using the work energy theorem, what is the magnitude of the applied force?
Axis of rotation
30
B: Where on the sphere would to apply the force to get maximum torque. Use equations to justify your
answer
Transcribed Image Text:8: A sphere, I= 0.45 kg m' and r= 8 cm, is initially rotating at 22 rad/s. You put your hand on the sphere at point P and slow the disk to 4 rad/s while it rotates 7.2 times. A: Using the work energy theorem, what is the magnitude of the applied force? Axis of rotation 30 B: Where on the sphere would to apply the force to get maximum torque. Use equations to justify your answer
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