A 4 kg block is placed on a rough horizontal surface. The coefficient of friction between the block and the surface is `mu= 0.5`. A force F = 18 N is applied on the block making an angle `theta` with the horizontal. Find the range of values of `theta` for which the block can start moving.
[Take `g = 10 m//s^(2) , tan^(-1)(2) = 63^(@) sin^(-1) ((10)/(9sqrt(1.25))) = 84^(@)`]

Answer

`21^(@) lt theta lt 33^(@)`