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Sr.No. 6175 B.Tech. Computer Science & Engineering (CSE) - Ist Sem. (Credit Based Evaluation & Grading System) (2119) Paper : CEL-120 Engineering Mechanics : Time allowed : 3 hrs. Max. Marks : 80 Instructions to Candidates: . ee ‘ Note: Attempt total five question by selecting at least/from each section, Fifth question can be attempted from any section. Each question carries equal marks, Qu SECTION A a) List and briefly explain the types of force systems with exam I i iples? @® b) Find the resultant of the parallel force system shown in fig. 01 and locate the same with Tespect to pointC. (8) Q.2 a) State and prove Varignon’s theorem, 8) b) Rope AB shown in fig. 02 is 4.5m long and is connected at two points A and'B atthe same level 4m apart. A led OF 1500 N is suspended from point C on the rope at 1.5m from A. What load connected at point D on the rope, 1m from B will be necessary to keep the position CD horizontal? @®) SECTION B Q3 s a) State the difference between perfect frame and an imperfect frames? What are the assumption made in finding the forces in a frame? (4) b) Determine the forces in all the members of the frames shown in fig. 03. Indicate the nature of forces also. (12) Q4 a) Difference between the centre of gravity and centroid. (4) b) Determine the centre of gravity of planc section uniform lamina shown in fig. 04. (12) SECTION C Qs : : a) Determine the moment of inertia of the built up section shown in fig.05 about its centroid axis x-x andy-y. (16) Q6 a) Derive the expression of moment of inertia of a triangular section having height ‘h’ base width ‘b’ axis passing through its base. 4‘ (8) b) State and prove the parallel axis theorem of moment of inertia. @) : SECTION D Q7 a) Define work energy principle. Also derive the equation for work energy principle? ® b) A tram car weighs 120KN, the tractive resistance being 5N/KN. What power will be required to propel the car at a uniform speed of 20Kmph? (1) on the level surface, (2) up an incline of 1 in 300 and, (3) down an inclination of 1 in 300? Take efficiency of motor as 80%. ® * Gs a) Draw the shear force and bending moment diagram for the simply supported overhanging beams loaded shown in fig. 06. Also determine the location of points of contraflexure, if any. : (12) b) Define beam and its types. List various types of loads to which a beam can be subjected. 4 PTO 
