The handles of a table-drawer are equidistant from the sides of the drawer and are distant c from each other. Show that it will be impossible to pull the drawer out by pulling one handle if `l le mu c` where `l` is the length of the drawer from back to front and `mu` is the coefficient of friction
[Hint : Consider a force applied at inclination `theta` with the knob of the handle. Apply conditions for translational and rotational equilibrium. Hence show it is possible to draw when
`tan theta ge (l-muc)/(mu^(2)c+2mu^(2)x+2muI)`
Since `tan theta` is positive, `l ge mu c`]