Question

The force between two surface in contact and usually act opposite to the direction of motion is called​

Answer 1

Explanation:

When two surfaces come into contact, forces are applied by each surface on the other. The part which is tangent to the contacting surfaces is called the frictional force. ... Friction force acts opposite to the direction of motion

Answer 2

Friction force opposes the motion between two surfaces in contact with each other .

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