Question

16. Write 2 methods to prevent friction.​

Answer 1

Explanation:

✒Methods for decreasing friction:

1. Make the surfaces smoother. Rough surfaces produce more friction and smooth surfaces reduce friction.
2. Lubrication is another way to make a surface smoother. ...
3. Make the object more streamlined. ...
4. Reduce the forces acting on the surfaces. ...
5. Reduce the contact between the surfaces.

Answer 2

Answer:

a) By polishing the surfaces, the friction reduces.

b) By using lubricants like oil, grease, etc...

c) By Streamlining

Friction due to to air is considerably reduced by streamlining the shape of the body moving through air. For example: jets, aeroplane and fast moving cars are given streamlined shape.

d) By using ball bearings in vehicles, sliding friction is converted into rolling friction which is much less.