The diffrent frictions and how they apply in life.

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In summary, on the last section of our learning, we covered the various types of friction including kinetic friction, static friction, and rolling friction. When a person is walking, the friction that occurs is kinetic friction. However, when a car is braking or accelerating, it can be either static or kinetic friction depending on the situation. If the car is skidding, it is kinetic friction, but if it is coasting to a stop, it is rolling friction. It is important to note that static friction is always greater than kinetic friction and can prevent an object from moving even with a force applied to it.
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HaZzArD 09
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Okay, so on this last section we have been learning about friction. I'm a newby and right now we know of kinetic friction, static friction, and rolling friction. So the friction occurring when a person is walking would be kinetic right? Then when a car is braking it would be .. static?
When a car is accelerating.. Rolling?? I hope I got these right
 
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HaZzArD 09 said:
Okay, so on this last section we have been learning about friction. I'm a newby and right now we know of kinetic friction, static friction, and rolling friction. So the friction occurring when a person is walking would be kinetic right? Then when a car is braking it would be .. static?
When a car is accelerating.. Rolling?? I hope I got these right

Not really Hazzard,

Static friction is a type of friction that only acts on resting objects, and it is always bigger than kinetic friction..

(have you ever did calculations in the class about friction force acting on a moving object? if yes say so)

To make it more clear for you,

Lets say that we have a box at rest, its mass is 10 kg's and friction coeffecient between the box and the ground is 0.1.So you expect the friction force would be 1 always? (when there is a force acting horizontally).But its not the case, if you push the object with a force of 1.2 N it may* not move because of the static friction, and when it moves after you apply like 1.5 N, friction force would decrease to 1 N (thats kinetic friction)
 
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Friction for a person walking is static friction because there is no relative motion between the surfaces. Friction for a breaking car depends on what the car is doing. Most of the time when you are acclerating (or decelerating) it is static friction because there is no relative motion between tires surface and the road surface. If you break and accelerate suddenly and the car skids, it is kinetic friction. If you just let your car coast to a stop, it is rolling friction.
 

FAQ: The diffrent frictions and how they apply in life.

What is friction and how does it occur?

Friction is the force that resists the motion of two surfaces in contact. It occurs when two objects are in contact and moving relative to each other, or when an object moves against a surface.

What are the different types of friction?

The three main types of friction are static, sliding, and rolling friction. Static friction occurs when two surfaces are in contact but not moving relative to each other. Sliding friction occurs when two surfaces are in contact and moving relative to each other. Rolling friction occurs when an object rolls over a surface.

How does friction affect everyday life?

Friction plays a crucial role in everyday life. It allows us to walk, drive, and use tools without slipping or sliding. It also helps us grip objects and control their movements. Without friction, it would be difficult to perform many tasks that we take for granted.

What factors affect the amount of friction between two surfaces?

The amount of friction between two surfaces depends on factors such as the roughness of the surfaces, the force pressing the surfaces together, and the type of material the surfaces are made of. For example, rougher surfaces and greater force will result in more friction.

How can we reduce friction?

There are several ways to reduce friction, including using lubricants, such as oil or grease, between two surfaces, using smooth or slippery materials for the surfaces, and minimizing the force pressing the surfaces together. In some cases, adding ball bearings or rollers can also reduce friction by allowing the surfaces to roll instead of slide against each other.

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