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Question

What are the methods of reducing friction?


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Solution

Methods of reducing friction:

As the resistance experienced by the surface or by an object when it is moved over the other is known as friction. When a ball is thrown it moves up to some distance and stops. The ball is acted by an external force and it stops.

Example:

  1. Frame and door sliding against each other.
  2. Rubbing of hands together to generate heat.

In the above examples, we observe that the surface is smooth but when the same object is viewed under a microscope, it can seem that even the smooth appearing object has rough edges.

Methods to reduce friction:

Some methods to reduce friction are provided below:

  1. When objects are rolled over the surface, the friction between the rolled object and the surface can be reduced by using ball bearings.
  2. Using lubricants such as oil or grease can reduce the friction between the surfaces.
  3. By polishing the surface, polishing makes the surface smooth and friction can be reduced.

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