Question

mention the expression for coefficient of friction​

Answer 1

Answer:

Hello mate----------:

The formula to calculate the coefficient of friction is μ = f÷N. The friction force, f, always acts in the opposite direction of the intended or actual motion, but only parallel to the surface.

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Answer 2

Answer:

kindly mention the type of friction ....I'm assuming it is static .

now to meu is defined as coefficient of static friction .

suppose is a body is moving on a rough surface

then

N=mg ----(1)

as soon as the motion starts static friction gets converted to limiting friction (fl)

fl =kN where k is the coefficient of limiting friction and N is the normal on the body .

now as their is relative acceleration between two bodies the friction gets converted to kinetic .(fk)

fk=k1N where l1 is coefficient of kinetic friction.

one example of kinetic friction is when u rub ur hands a heat is generated in ur hands which is due to fk.

hope it clears ur doubt.

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