Calculating Torque: Solving a Bicycle Wheel Problem

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The discussion revolves around a problem involving torque and forces acting on a bicycle wheel that is positioned against a step. The problem specifies the height of the step, the weight of the wheel, and its radius, and asks for the force required to lift the wheel off the ground.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to calculate torque using the wheel's radius and weight but expresses uncertainty about how to proceed. Other participants suggest creating a diagram to visualize the forces acting on the wheel.

Discussion Status

The discussion is ongoing, with participants exploring the forces involved. The original poster has attempted to create a diagram but still feels unclear about the next steps. There is no explicit consensus yet on how to approach the problem further.

Contextual Notes

The original poster indicates a lack of clarity on how to begin the problem, suggesting potential gaps in understanding the concepts of torque and force interactions. The discussion may be constrained by the need for a visual representation of forces.

leezak
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The figure shows a bicycle wheel resting against a small step whose height is h = 0.110 m. The weight and radius of the wheel are W = 29.0 N and r = 0.350 m. A horizontal force F is applied to the axle of the wheel. As the magnitude of F increases, there comes a time when the wheel just begins to rise up and loses contact with the ground. What is the magnitude of the force when this happens?

i'm not even sure where to start... i figure to find the torque of the wheel i can multiply (.350) times (29) but i don't know i need help please!
 
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Please try to make a diagram showing all of the forces on the wheel.
 
i did and i still don't know what to do
 
OK, what forces did you get?
 

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