Engineering Mechanics Assignment Sheet – 3 Module – 3 Friction & Forces in Space Assignment Question 1. A block having mass 40 Kg and dimension as shown in Fig, is resting on a flat surface. The coefficient of static friction between the block and the surface is 0.3. Find the magnitude of tension T required to cause motion. Also describe in what manner motion would take place if: a) h = 15 cm b) h = 22 cm 2. A 10 0 wedge is to be forced under end B of 6 Kg rod AB. If µ s = 0.4 between the wedge and rod and 0.2 between the wedge & the floor. Determine the smallest force P require to raise end B of rod. 3. There block are placed on the surface one above the other as shown in fig. The static coefficient between the blocks and block C and surface is also shown. Determine the maximum value of P that can be applied before any Slipping take place. [Ans: 25.5 N]