Torque, Angular Displacement, Work

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Homework Help Overview

The discussion centers around a physics problem involving torque, angular displacement, and work related to a wheel being spun by a rope. The problem presents multiple parts, including calculating the unwinding rope length, work done, torque, and angular displacement during one revolution of the wheel.

Discussion Character

  • Mixed

Approaches and Questions Raised

  • Participants express uncertainty about how to begin the problem and seek assistance with various parts. Some have made progress on certain parts but are unsure about others, particularly the angular displacement. Questions arise about the relationship between the parts and how they interconnect.

Discussion Status

Some participants have provided insights into specific parts of the problem, while others continue to seek clarification on how to approach different aspects. There is an ongoing exploration of the relationships between torque, work, and angular displacement, with no explicit consensus reached.

Contextual Notes

Participants note the complexity of the problem due to its multiple components and express varying levels of understanding regarding the physics concepts involved.

warrior2014
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Torque, Angular Displacement, Work!

Homework Statement


The radius of a wheel is 0.525m. A rope is wound around the outer rim of the wheel. The rope is pulled with a force of magnitude 5.45 N, unwinding the rope and making the wheel spin counterclockwise about its central axis. Ignore the mass of the rope.
a) how much rope unwinds while the wheel makes 1.00 revolution?
b) how much work is done by the rope on the wheel during this time?
c) what is the torque on the wheel due to the rope?
d) what is the angular displacement Δθ, in radians, of the wheel during 1.00 revolution?
e) show that then numerical value of the work done is equal to the product τΔθ


Homework Equations



T= F*R

The Attempt at a Solution



I have no idea how to get this problem started. If anyone is able to help, please do so (I know there are a lot of parts to the question)! I'd really appreciate it :)
 
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Are you saying you can't answer part (a) ?
 


I figured out how to get (a), (b), (c) and (e) but unsure how to get (d). Could you please help me with that one?
 


How did you get (e) without getting (d)?
 


well the work done is going to be the same and since I knew that, I put the value in and it was correct
 


The quick way to answer (d) is to realize how many radians correspond to one complete rotation of the wheel.
 


how would you do part a?
 

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