A tube of length 50 cm is filled completely with an incompressible liquid of mass 250 g and closed at both ends. The tube is then rotated in horizontal plane about one of its ends with a uniform angular velocity $\mathrm{x}=\sqrt{\mathrm{F}} \mathrm{rad} \mathrm{s}^{-1}$ . If F be the force exerted by the liquid at the other end then the value of x will be________.