The mean diameter of a bolt having \(V\)-threads is \(25 \mathrm{~mm}\). The pitch of the threads is \(5 \mathrm{~mm}\) and the angle of threads is \(55^{\circ}\). The bolt is tightened by screwing a nut whose mean radius of the bearing surface is \(25 \mathrm{~mm}\). If the coefficient of friction for nut and bolt is 0.10 and for the nut and bearing surface is 0.15 , find the force required at the end of a \(0.5 \mathrm{~m}\) long spanner when the load on the bolt is \(10 \mathrm{kN}\).