The frictional force between two surfaces opposes their relative motion
The ratio of frictional force to the normal reaction varies for two given surfaces
The ratio of frictional force to the normal reaction is constant for two given surfaces
The limiting frictional force is independent of the area of surface in contact.
Dynamic frictional force is independent of the relative velocity of the surfaces in contact.
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Discussions (3)
Myschool, kindly make corrections, the answer is C being that the coefficient of friction between two given dissimilar surfaces is different. One can have less frictional force acting on it.
B is lucid 💯✅
Now listen..
Coefficient frictional force varies from one point to another
(U)
But the ratio of frictional force to normal reaction is constant
So it's wrong to say. They varies
That's why B is good ✅
