A block of mass 10 kg is kept on a rough inclined plane as shown in the figure. A force of 3 N is applied on the block. The coefficient of static friction between the plane and the block is 0.6 . What should be the minimum value of force P , such that the block doesnot move downward? $$ \left(\text { take } \mathrm{g}=10 \mathrm{~ms}^{-2}\right) $$