What is the Output Force of a Wheel Axle?

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Homework Help Overview

The discussion revolves around calculating the output force of a wheel axle system, where a force is applied to a wheel with a specified radius, and the axle has a different radius. The context involves concepts from mechanics, particularly related to simple machines and mechanical advantage.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants express uncertainty about how to start the problem, with some suggesting to consider equations related to simple machines and mechanical advantage. Questions about angular momentum and torque are raised, indicating a search for relevant concepts. There is also a discussion about interpreting the setup as a lever system.

Discussion Status

The discussion is ongoing, with participants exploring various concepts that may relate to the problem. Some have offered guidance on thinking about mechanical advantage and the relationship between input and output forces, while others are still grappling with foundational concepts.

Contextual Notes

Participants mention that certain concepts, such as torque, have not yet been covered in their studies, which may affect their ability to fully engage with the problem. There is also a reference to the need for clarity on the definitions of input and output forces in the context of the problem.

NatalieWise123
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Homework Statement


You apply a force of 17 N to a wheel with a radius of 0.75 m. If the axle has a radius of 6 cm, what is the output force, assuming the machine operates under ideal conditions?

Homework Equations

The Attempt at a Solution


I don't even know how to begin to begin this. Help!
 
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Google "simple machines output force".
 
Begin with thinking about all the equations you were given in class.
 
NatalieWise123 said:
I don't even know how to begin to begin this. Help!
What do you know about angular momentum?
 
TeethWhitener said:
What do you know about angular momentum?

Angular Momentum= mass*velocity*radius
 
Isaac0427 said:
Begin with thinking about all the equations you were given in class.

I'm thinking it has something to do with Idea Mechanical Advantage which is output/input I believe.
 
How about torque? (I probably should have said torque in my first post)
 
TeethWhitener said:
How about torque? (I probably should have said torque in my first post)

We haven't learned that yet
 
Hmm. Ok. It is about mechanical advantage. It's just a little easier to understand if you know about torque. No big deal. But gimme a sec to think about how to explain the problem without torque.
 
  • #10
Have you gone over concepts such as angular velocity yet?
 
  • #11
You can think of the setup like a lever, with each arm being a radius and the fulcrum being the shared center of rotation (axis). Surely you've covered simple machines like levers?

Fig1.png
 
  • #12
TeethWhitener said:
Have you gone over concepts such as angular velocity yet?

In a really general sense. I understand it though.
 
  • #13
gneill said:
You can think of the setup like a lever, with each arm being a radius and the fulcrum being the shared center of rotation (axis). Surely you've covered simple machines like levers?

View attachment 91966

Sort of. Would output force be F2?
 
  • #14
NatalieWise123 said:
Sort of. Would output force be F2?
Sure. For a lever, which end is "input" and which is "output" is your choice based on the situation at hand. Base your choice on the scenario presented in the problem statement.
 
  • #15
gneill's picture is probably much better help than anything I could put into words.
 

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