# An object with a mass of # 18 kg# is lying on a surface and is compressing a horizontal spring by #60 cm#. If the spring's constant is # 4 (kg)/s^2#, what is the minimum value of the surface's coefficient of static friction?

##### 1 Answer

Mar 31, 2016

Force **F** required to compress a spring by **x** unit is

Here x =0.6m

hence Force exerted on the object of mass 1 kg is

This force is balanced by the then static frictional force as it is self adjusting one,

So the minimum value of the coefficient of static frictions

So