Friction does not care about area

In summary, friction depends on normal force and the weight of an object. If an object has four legs on the ground, its full weight contributes to the normal force, making it harder to move than if only two legs are on the ground and supporting part of the weight.
  • #1
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I heard the Firction does not care about area or at least the friction equations do not have a varible for area, if that is true then why is it hard to pull something like a table when 4 legs are on the ground then when two legs are on the ground?


- BeachMountain
 
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  • #2
Friction depends on normal force. If the four legs of the table are on the ground, the whole weight of the table contributes to the normal force. If you lift two legs, you are supporting part of the weight, so the normal force is less.
 
  • #3
SGT is exactly on the spot with the answer.
 

1. What is friction area?

Friction area refers to the surface area of an object in contact with another object or surface. It is the area where two objects rub against each other, creating resistance or friction.

2. How does friction area affect motion?

The larger the friction area, the greater the amount of friction that is produced. This can slow down or impede motion, making it more difficult for an object to move smoothly.

3. What factors can affect the size of the friction area?

The type of surface, the force applied, and the materials of the objects in contact can all affect the size of the friction area. Rougher surfaces and higher levels of force can result in a larger friction area.

4. How can friction area be reduced?

Friction area can be reduced by using lubricants, such as oil or grease, between two surfaces. This creates a slippery layer that reduces the amount of friction produced.

5. Why is understanding friction area important in science?

Understanding friction area is important in science because it helps us understand and predict how objects will interact and move in different environments. It is also crucial in the design and development of machines and structures, as friction can have a significant impact on their performance and longevity.

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