if the normal reaction decreased by 4 times then its coefficient statices friction
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The coefficient of friction is constant for two given surfaces in contact and it does not depends upon the normal reaction. So, the coefficient of friction remains unchanged
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It’s perhaps the second week of your introductory physics course. Your instructor starts talking about friction and writes the following two formulas on the board. Then there is probably some sort of lecture like this: Friction is a contact force when two surfaces interact. The second equation is the kinetic frictional force that is used […]
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