Question

The ratio between the force of sliding friction and the normal force of an object is called _____.

A.rolling friction
B.the drag
C.the coefficient of friction
D.the starting friction

Answer 1

Answer: The correct answer is C.

Explanation: Frictional force is the contact force which resists the motion of one surface on another.

Mathematically,

`f=\mu N`

where,

f = frictional force

`\mu` = Coefficient of friction

N = normal force acting on a body

We need to find the ratio of force of sliding friction ( which is a type of frictional force) and the normal force acting on an object. This will be equal to coefficient of friction.

`\mu=(f)/(N)`