Code No: R05010302 Set No. 1 I B.Tech Supplimentary Examinations, Febr uar y 2008 ENGINEERING MECHANICS ( Common to Mechanical Engineering, Mechatronics, Metallurgy & Material Technology, Production Engineering, Aeronautical Engineering and Automobile Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆ ⋆ ⋆ ⋆ ⋆ 1. A mast AB supported by a spherical socket at A and horizontal guy wires BC and BD carries a vertical load P at B as shown in Figure 1. Find the axial force induced in each of the three members of this system. [16] Figure 1 2. (a) Find the leas t horiz ontal force ‘P’ to start motion of any part of the system of three blocks resting upon one another as shown in figure2a. The weights of the blocks are A = 3000N, B = 1000N, C = 2000N. Between A and B µ= 0.3, between B and C, µ = 0.2 and between C and the ground µ = 0.1. Figure 2a (b) A block overlying a 10 0 wedge on a horizontal floor and leaning against a vertical wall and weighing 1500N is to be raised by applying a horizontal force to the wedge. Assuming the coefficient of frict ion to be 0.3, determine the minimum horizo nt al force to be applied to rais e the block. As shown in the Figure2b. [8+8] 1 of 3 www.estudentzone.com www.estudentzone.com
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