Two block `m and M` tied together with an inextensible string are placed at rest on a rought horizontal surface with coefficient of friction `mu` The block `m` is pulled with a variable force `F` at a varying angle `theta` with the horizontal .The value of `theta` at which the least value of `F` is required to move the blocks given by

Options

A. `theta = tan ^(-1)mu`
B. `theta gt tan ^(-1)mu`
C. `theta lt tan ^(-1)mu`
D. Insufficient data

Answer

a

Explanation

Minimum effert is required by pulling a block as the angle of friction