Friction direction in circular motion

In summary, the conversation discusses the role of friction in causing centripetal force in circular motion. It is mentioned that without friction, there would be no centripetal force and the vehicle would go straight. However, it is clarified that in this case, static friction is at play, which acts to prevent potential relative motion rather than opposing actual motion. This explains why the force acts centrally instead of backwards.
  • #1
jd12345
256
2
In a circular motion without any banking of road frictional force is the only force causing centripetal force right? But why does it act centrally? Without friction the vehicle will go straight as no centripetal force is present. But frictional always acts opposite to the direction of motion. So it must act opposite to the motion of the vehicle that is backwards and not centrally! Well this suggests there is no central force to make the vehicle move in circular direction. There is only backward force
I think i am missing something. Where am i wrong?
 
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  • #2
Dynamic friction acts oppositely to the relative motion of the bodies in contact. But here you're dealing with static friction - the wheels are rolling, not skidding. Static friction acts to oppose a potential relative motion, not an actual one.
 

1. What is the direction of friction in circular motion?

The direction of friction in circular motion is always directed towards the center of the circular path, known as the centripetal direction.

2. Why does friction act in the centripetal direction in circular motion?

Friction acts in the centripetal direction in circular motion because it is necessary to provide the necessary force to keep an object moving in a circular path. Without this force, the object would continue in a straight line tangent to the circle.

3. How does the direction of friction change in different parts of a circular path?

The direction of friction remains constant throughout the entire circular path. However, the magnitude of the frictional force may change as the speed or direction of the object changes.

4. Can the direction of friction ever be opposite to the centripetal direction in circular motion?

No, the direction of friction can never be opposite to the centripetal direction in circular motion. Friction always acts in the opposite direction of the motion, and in circular motion, the motion is towards the center of the circle.

5. How does the mass of an object affect the direction of friction in circular motion?

The mass of an object does not affect the direction of friction in circular motion. Friction is dependent on the surface and the normal force, but not on the mass of the object. However, a heavier object may require a stronger frictional force to keep it in a circular path.

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