Question

How to reduce energy losses due to the friction?

Answer 1

New methods being adopted to reduce friction:

1. Use of Lubricants: 
The parts of machines which are moving over one another must be properly  lubricated by using oil and grease.

2. Use of ball bearing :
In machine where possible, sliding friction can be replaced by rolling friction
by using ball bearings.

3. Streamlining:
Friction can Be reduced by changing the design of fast moving objects. The front of vehicles and aeroplanes made  to overcome fluid friction.

4. By making the surface Smooth:
Friction can be reduced by making surfaces smooth...

hope it helps !!!

thnx :}