Question

On a particular surface, the frictional force on a `45` `kg` mass is `60` `N`. What is the frictional coefficient between the block and the surface?

Answer 1

The weight force due to the mass of the body is `F_w=mg=45xx9.8=441` `N`. The frictional force `F_f` is `60` `N`.

The frictional coefficient, `mu`, is `mu=(F_f)/(F_w)=60/441=0.14`

Frictional coefficients do not have units.