Do friction forces exist?

In summary, the presence of friction forces at the point where the rod and the bowl touch depends on the smoothness of the bowl's surface. If the bowl is smooth, then friction forces will not exist. However, if the bowl is not smooth, friction forces may exist at the point of contact.
  • #1
zasdfgbnm
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Homework Statement


http://picasaweb.google.com/lh/photo/ChOBWTwVEO3hI0wtftmdmw?feat=directlink [Broken]
A rigid rod is put in a global bowl horizontally.The bowl is shaggy.Do friction forces exist where the rod and the bowl touch?

Homework Equations





The Attempt at a Solution


If the bowl is smooth,it's clear that friction forces don't exist.But what if the bowl is not smooth?
 
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  • #2
zasdfgbnm said:

Homework Statement


http://picasaweb.google.com/lh/photo/ChOBWTwVEO3hI0wtftmdmw?feat=directlink [Broken]
A rigid rod is put in a global bowl horizontally.The bowl is shaggy.Do friction forces exist where the rod and the bowl touch?

Homework Equations



The Attempt at a Solution


If the bowl is smooth,it's clear that friction forces don't exist.But what if the bowl is not smooth?

Friction is a resistance to force. If the rod is otherwise stabilized by balanced forces x,y , then the effect of friction is not a static consideration.
 
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  • #3


I cannot provide a definitive answer without further information and experimentation. Friction is a complex phenomenon that depends on various factors such as the surface roughness, materials involved, and applied forces. In this scenario, it is possible that friction forces may exist at the point where the rod and bowl touch, depending on the specific characteristics of the rod and bowl surfaces. To determine the presence and magnitude of friction forces, we would need to conduct experiments and measurements to analyze the interaction between the two surfaces. Therefore, it cannot be conclusively stated whether friction forces exist without further investigation.
 

1. What is friction and how does it work?

Friction is a force that opposes the motion of two objects in contact with each other. It is caused by microscopic irregularities on the surfaces of the objects, which create resistance and make it harder for the objects to move past each other.

2. Why do some surfaces have more friction than others?

The amount of friction between two surfaces depends on the nature of the materials and the amount of force pressing them together. Rougher surfaces tend to have more friction because there are more points of contact between the two objects, creating more resistance.

3. Can friction be completely eliminated?

No, friction is a fundamental force of nature and cannot be completely eliminated. However, it can be reduced by using lubricants or by smoothing out the surfaces of objects.

4. How does friction affect the movement of objects?

Friction can either help or hinder the movement of objects. For example, it can provide traction for vehicles and allow us to walk without slipping. On the other hand, friction can also slow down or stop the movement of objects, such as a ball rolling on a rough surface.

5. Is friction always bad?

No, friction is not always bad. In fact, it is essential for many everyday activities, such as writing with a pencil, playing sports, and driving a car. Without friction, it would be difficult to control the movement of objects and perform certain tasks.

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