How limiting friction is directly proportional to normal reaction?
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The direction of force of friction is always in a way that it opposes the direction of motion. It depends upon the roughness or smoothness of the surfaces in contact and acts tangentially to the interface between them. It is directly proportional to normal reaction 'R' between the two surfaces in contact.
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Explanation:
The direction of force of friction is always in a way that it opposes the direction of motion. It depends upon the roughness or smoothness of the surfaces in contact and acts tangentially to the interface between them. ... It is directly proportional to normal reaction 'R' between the two surfaces in contact.
Hence frictional force is directly proportional to the normal force between the two surfaces in contact. Because when two surfaces are pressed together harder, there is more friction. The normal force measures how much force is pressing the surfaces together.
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