Question

Write true or false :
1. Ball-bearings are used to increase friction.
2. If area of contact increases the friction reduces.
3. Liquids exert greater frictional force on a solid than other solids
4. Friction is due to the roughness of the two surfaces in contact with each other.​

Answer 1

Answer:

1. False

2. False

3. True

4. True

Answer 2

Answer:

1. FALSE

2.FALSE

3.TRUE

4.TRUE