Question

3. Friction is caused due to -
of the irregularities of the two surfaces
in contact.
4. Friction helps in
and
5. Friction offered by a fluid is called​

Answer 1

Answer:

Friction helps in holding bodies on the surface which is necessary for activities like walking etc. it causes wear and tear but it has benefits also.So it is a necessary evil

Fluid friction and this property of liquid is called it's viscosity..