write some method to control of friction
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Polishing
Polishing the surface, reduces the irregularities and hence, reduces friction.
Lubrication
It provides a layer of the lubricant on which the bodies can easily slide.
Use of ball-bearing or roller bearing
Ball
/roller bearing help to convert sliding friction into a milder form - rolling friction. Rolling friction is lesser than sliding friction.
Streamlining
Fast cars, boats, planes etc., have a streamlined body. This is to allow air (or water in the case of boats) to easily flow by, without offering much resistance.
Use of correct combination of surfaces in contact
Use of alloys on moving and sliding parts reduces friction because alloys have a low coefficient of friction.
Why is it easier to pull a body than to push it ?
If you have ever mowed the lawn using a mower, you would have noticed that pushing the mower is more difficult than pulling it.
Have you ever wondered why?
Let us try to understand this by a simple block and plane example.
When the block is pushed, the vertical component of the push increases the normal force. Hence, there is an increase in friction.
Polishing the surface, reduces the irregularities and hence, reduces friction.
Lubrication
It provides a layer of the lubricant on which the bodies can easily slide.
Use of ball-bearing or roller bearing
Ball
/roller bearing help to convert sliding friction into a milder form - rolling friction. Rolling friction is lesser than sliding friction.
Streamlining
Fast cars, boats, planes etc., have a streamlined body. This is to allow air (or water in the case of boats) to easily flow by, without offering much resistance.
Use of correct combination of surfaces in contact
Use of alloys on moving and sliding parts reduces friction because alloys have a low coefficient of friction.
Why is it easier to pull a body than to push it ?
If you have ever mowed the lawn using a mower, you would have noticed that pushing the mower is more difficult than pulling it.
Have you ever wondered why?
Let us try to understand this by a simple block and plane example.
When the block is pushed, the vertical component of the push increases the normal force. Hence, there is an increase in friction.
patelArchit:
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