The state of stress at a point is given by x=-6MPa, y = 4 MPa and =-8 MPa. The maximum tensile stress (in MPa) at the point is == Q. 30 Txy Q. 31 A block R of mass 100 kg is placed on a block S of mass 150 kg as shown in the figure. Block R is tied to the wall by a massless and inextensible string PQ. If the coefficient of static friction for all surfaces is 0.4, the minimum force F (in kN) needed to move the block S is P Q (A) 0.69 (C) 0.98 RS jvildatas.com F (B) 0.88 (D) 1.37 Q. 32 A pair of spur gears with module 5 mm and a center distance of 450 mm is used for a speed reduction of 5:1. The number of teeth on pinion is Q. 34 An ideal waterjet with volume flow rate of 0.05 m/s strikes a flat plate placed normal to its path and exerts a force of 1000 N. Considering the density of water as 1000 kg/m, the diameter (in mm) of the water jet is