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What is Law of Friction in Physics

Law of Friction in Physics




The value of limiting friction increases proportionally with the increase in normal reaction. Hence, liming friction F(s} is directly proportional to the normal reaction.



F(s) < R (Here < represents the sign of proportionality don’t’ write it in the examination paper.)




=> FS= UR………….. (i)


U= F(S)/R


u is the constant of proportionality, which depends upon the nature of the surfaces of the two surfaces in contact. It is known as the coefficient of friction. It is only a number without any unit. We know that the normal reaction is directly proportional to the weight of the block, Therefore,


R = W = mg


Substituting the value of R in equation…………… (i)


FS = umg


The ability to quickly return to the desired location facilitates the learning process. And it’s easier to do this with printed text than with an audio file. Curiously, before starting the experiment, most of the students wanted to join the audio group. But immediately after the test, many said that they did not remember much and would prefer reading. There are other obstacles that interfere with the assimilation of information by ear. For example, in a book, important places may be underlined or in bold.

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