Question

please tell this answer it is very important
1 Friction is the force _____ the relative motion two surface in contact
2 Friction is caused by the ______ on the surface in the contact​

Answer 1

Answer:

The friction that exists between two surfaces in contact, when there is no relative motion between them is called static friction. Only when the relative motion starts the sliding friction starts to act.

Nature of surface plays major role in causing the friction. A rough surface produces more friction than a smooth surface. The rough surface that has more irregularities on it than the smooth surface, so more force is required to overcome the friction caused by irregularities.

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