Question

Match the following:
(A)
1. Fluids
2. Friction
3. Fourth law of friction
4. Line of action of force
5. Polishing
(B)
(a) A necessary evil
(b) Liquids and gases
(c) Resultant of the forces of limiting friction
(d) Friction depending on nature of materials and surfaces
(e) Makes the surfaces smoother​

Answer 1

Answer:

1.b

2.a

3.

4.

5.e

sorry I don't know 3and 4