Question

1 .What is frictional force? Suggest and briefly explain three methods by which friction can
be minimised.
2. List any three ways by which friction can be increased and reduced.
3. What is fluid friction? Explain why objects moving in fluids must have special shapes.
4. How many types of friction have you come across? Define them. Is rolling friction more
than dynamic friction?
5. Discuss three ways in which friction is an advantage in our daily life?​

Answer 1

Explanation:

1. Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact. Friction opposes motion. By applying grease and oil. By fixing ball bearings. By polishing the surface.
2. What are the methods of reducing friction ? Explain
3. By using lubricants: friction increases as the roughness of the surface increases. ...
4. Polishing surfaces: It makes the surfaces even and hence reduces friction.
5. By using ball bearings: Rotating machines can be mounted on ball bearings. ...
6. By streamlining: streamlining reduces the area of contact and thus reduces friction.

I hope that will be help you my friend