state the laws of limiting friction
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The laws of limiting friction are:
- The direction of force of friction is always opposite to the direction of motion.
- The magnitude of limiting friction depends upon the nature and state of polish of the two surfaces in contact and acts tangentially to the interface between them.
- The magnitude of limiting friction 'F' is directly proportional to normal reaction 'R' between the two surfaces in contact.
- The magnitude of limiting friction is independent of area and shape of surfaces in contact as long as the normal reaction remains the same.
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The friction force which balances applied force when the body is called force of limiting friction.In other words, static
friction prevents sliding motion.
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