Question

How can we reduce friction?

Answer 1

We can reduce friction by using ball bearings in machinery, lubricants in moving parts of the vehicle. To overcome the fluid friction and air drag, ships and Aeroplanes should be in streamlined shape. And also by increasing the smoothness friction can be reduced. 

Answer 2

$\huge{\rm{\purple{Answer:-}}}$

Methods of increasing friction:-

1) By making the surface rough.

2)By removing all the lubricants.

3)By increasing the mass of the body

Methods of decreasing friction:-

1)By using lubricants.

2)By making the body streamlined

3)By using ball bearings.