A wheel of mass M has radius R. It is positioned vertically on the floor and you exert a horizontal force F at the center of mass so that it will climb a step against which it rests. (this is like pushing a bike wheel over a curb) If the step has a height h, with h
A wheel of mass M has radius R. It is positioned vertically on the floor and you exert a horizontal force F at the center of mass so that it will climb a step against which it rests. (this is like pushing a bike wheel over a curb) If the step has a height h, with h
International Edition---engineering Mechanics: Statics, 4th Edition
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ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
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Chapter4: Coplanar Equilibrium Analysis
Section: Chapter Questions
Problem 4.169RP: The uniform, 20-kg bar is placed between two vertical surfaces. Assuming sufficient friction at A to...
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![A wheel of mass M has radius R. It is positioned vertically on the floor and you exert
a horizontal force F at the center of mass so that it will climb a step against which it
rests. (this is like pushing a bike wheel over a curb) If the step has a height h, with
h<R, what minimum force is needed?
(a) What is the torque of F about the contact point with the stair?
(b) The instant the object lifts, the normal force is reduced to zero. At this
instant, what is the torque of gravity about the contact point with the stair?
(c) Given (a) and (b), what value of F will cause the wheel to climb the step?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2a1a7db6-8f8f-43d1-b008-03a5d653c710%2F39c49d50-b7b4-48c1-8b60-409e3a3ecd84%2Fkpf9tfe_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A wheel of mass M has radius R. It is positioned vertically on the floor and you exert
a horizontal force F at the center of mass so that it will climb a step against which it
rests. (this is like pushing a bike wheel over a curb) If the step has a height h, with
h<R, what minimum force is needed?
(a) What is the torque of F about the contact point with the stair?
(b) The instant the object lifts, the normal force is reduced to zero. At this
instant, what is the torque of gravity about the contact point with the stair?
(c) Given (a) and (b), what value of F will cause the wheel to climb the step?
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