the property which opposes the realtive motion between two bodies in contact
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Answer:
Friction is the property which opposes the relative motion between two bodies in contact.
It is an opposing force that opposes the motion of one body over the surface of another body. Like in case of a ball freely rolling on the ground, the ball eventually comes to stop, because of the force of friction that acts between the ball and the ground.
This means that if force acts from right to left, friction acts in left to right direction. Alternatively, if force acts from left to right, friction acts in right to left direction. It comes in notice only when two surfaces are in contact with each other it is called Contact force. It is offered by solids, liquids as well as by gases but it is maximum in the case of solids and least in the case of gases..