A 50 kg mass is tied to a massless rope that is fixed to the surface a of a drum with a radius of 0.25 m. If the mass is suspended by the rope 10 meters below the top of a building, how many revolutions of the barrel would be required to raise the mass to the top of the building? If a handle is fixed on the outer edge of the barrel, what is the torque that must be applied to raise the barrel? How much work must someone do to raise the mass all of the way to the top? If the handle extended 0.25 m further from the edge of the barrel, what force must the worker apply to the handle?
A 50 kg mass is tied to a massless rope that is fixed to the surface a of a drum with a radius of 0.25 m. If the mass is suspended by the rope 10 meters below the top of a building, how many revolutions of the barrel would be required to raise the mass to the top of the building? If a handle is fixed on the outer edge of the barrel, what is the torque that must be applied to raise the barrel? How much work must someone do to raise the mass all of the way to the top? If the handle extended 0.25 m further from the edge of the barrel, what force must the worker apply to the handle?
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter13: Rotation Ii: A Conservation Approach
Section: Chapter Questions
Problem 30PQ
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A 50 kg mass is tied to a massless rope that is fixed to the surface a of a drum with a radius of 0.25 m. If the mass is suspended by the rope 10 meters below the top of a building, how many revolutions of the barrel would be required to raise the mass to the top of the building?
If a handle is fixed on the outer edge of the barrel, what is the torque that must be applied to raise the barrel? How much work must someone do to raise the mass all of the way to the top?
If the handle extended 0.25 m further from the edge of the barrel, what force must the worker apply to the handle?
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