Types of Friction


 
 
Concept Explanation
 

Types of Friction

Friction can be divided into following type

Static friction: When we apply a force on a body to make it move and it does not move, the force applied is balanced by the force of friction. Thus, “the force of friction in static (stationary) situation is self adjusting. Such force of is called static friction’

Sliding Friction: The force of friction acting between the two surfaces, when one of them just slides over the other surface with a uniform speed is called sliding friction. Sliding friction is less than the static friction

Rolling Friction: When a body is placed over the other bodies like roller or a wheel and is allowed to move this is called rolling friction. It is same as the sliding friction. So, whenever possible sliding friction can easily be replaced by rolling friction. This can be done by using wheels, roller bearings, ball bearings, etc.

Examples of Rolling Friction:

1. The suitcases and travelling bags are provided with small wheels. These wheels have very small amount of rolling friction which help easy movement of suitcase and travelling bags.

2. Roller skates are having small wheels which offer very small rolling friction and help skater to move fast.

Sample Questions
(More Questions for each concept available in Login)
Question : 1

When we apply a force on a body to make it move but and it does not move, the force applied is balanced by the force of friction. Such force of is called _________________ .

Right Option : B
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Explanation
Question : 2

Which is the correct increasing order for different kinds of friction ?

Right Option : B
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Explanation
Question : 3

Which type friction offers least resistance ?

Right Option : B
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Explanation
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