Question

please answer 5 th
I mark brain list​

Answer 1

Answer:

The resistance offered by the surfaces that are in contact with each other when they move over each other is called friction.

Frictional force depends on the nature of the surface in contact. The rougher the surface, the greater the friction involved. Frictional force is proportional to the pressing force, which is the weight of the body. It is independent of the area of contact.

Answer 2

3ans:

1.Non content force

2.Content force

examples:Gravitational force.

Electric force.

Magnetic force.

Nuclear force.

Frictional force.

4.the force applied perpendicular to the surface of an object per unit area over which that force is distributed

(i am sry but i am not sure about the si unit ithink its Pascal)

5.Friction is a force between two surfaces that are sliding, or trying to slide, across each other.

Hope this answer help you Tq