A single block brake, as shown in Figure 16.8 (a), has brake drum diameter of \(250 \mathrm{~mm}\). It can withstand \(300 \mathrm{Nm}\) torque at \(500 \mathrm{rpm}\). The coefficient of friction between block and drum is 0.25 . Determine the force \((\mathrm{P})\) required to apply when the drum rotates in: (i) clockwise direction, and (ii) counter clockwise direction. Given: angle of contact \((2 \theta)=100^{\circ}, x=150 \mathrm{~mm}\), \(a=40 \mathrm{~mm}, l=1000 \mathrm{~mm}\).