A block of weight W rests on horizontal floor with coefficient of static friction `mu` . It is desired to make the block move by applying minimum amount of force. The angle `theta ` from the horizontal at which the force should be applied and the magnitude F of the force is

Options

A. `theta = 0,F = mu W`
B. `theta = tan^(-1) , F = (mu W)/(sqrt(1+mu^2))`
C. `theta = tan^(-1) (1/mu) , F = (muW)/(sqrt(1+mu^2))`
D. `theta = tan^(-1) ((mu)/(1+mu)),F= (muW)/(1+mu^2)`

Answer

B