Bank Curve Friction: How Does it Act?

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Discussion Overview

The discussion revolves around the role of friction in banked curves, particularly how it interacts with centripetal force. Participants explore theoretical aspects of banked curves, the mechanics involved, and the implications of friction in these scenarios.

Discussion Character

  • Debate/contested

Main Points Raised

  • Some participants propose that friction provides additional centripetal force, while others argue that a properly engineered banked curve does not rely on friction, depending solely on the normal force.
  • One participant questions the direction of friction, suggesting it should act opposite to the centripetal force, as the object tends to move straight.
  • Another participant discusses the necessity of friction in unbanked curves, stating that it is what allows a vehicle to turn by pushing it toward the center.
  • A participant presents a challenge regarding free body diagrams (FBD), indicating confusion about the forces involved when friction is considered, particularly in relation to gravitational force and normal force components.
  • One participant expresses uncertainty about the availability of resources on banked curves with friction, acknowledging the complexity of the topic.

Areas of Agreement / Disagreement

Participants do not reach a consensus; multiple competing views regarding the role and direction of friction in banked curves remain unresolved.

Contextual Notes

Limitations include potential misunderstandings of force diagrams, the dependence on specific definitions of friction and centripetal force, and the lack of resources addressing banked curves with friction in educational materials.

glueball8
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How does Bank Curve Friction act on the object?
 
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The friction provides additional centripetal force, but a properly engineered banked curve does not rely on friction at all, only the normal force.
 
K I know that but I don't see how that can work... why would fricition act in the direction of the centripetal force? the object wants to go to the center, if friction is considered shouldn't it be in the opposite direction?
 
Consider an unbanked curve. Without friction, you wouldn't be able to turn your car to make the curve. The car "wants" to keep going straight. It's friction that pushes the car toward the center.
 
My teacher says that Ff is acting inward. Like you said.

But I did a FBD.

For non-friciton mg=Fn*cosx. But the if there is Ff there is a downwards components. So that's not really possible is it?

Can you send me a link?? I checked 4 book and non of them has bankcurved with friction problem. I'm probability wrong but science is the doubt of experts right? :smile:
 
NVM! I think I found a link
 

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