0 C2801 8 Pages: 2
Reg No.: ‏سے‎ Name: 2 | P
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIRST/SECOND SEMESTER B.TECH DEGREE EXAMINATION, APRIL 2018
Course Code: BE100 7
Course Name: ENGINEERING MECHANICS
Max. Marks: 100 Duration: 3 Hours
PART A
Answer all questions, each carries 5 marks. Marks
1 What are the conditions of equilibrium in concurrent and non concurrent force (5)
system?
2 A force of magnitude 60 N is applied at the origin of the x-y-z axes and through (5)
the point A (1,1.5,2.25). Determine the components of force along x,y,z axes and
the direction of force with respect to the axes.
3 Define radius of gyration and product of inertia. (5)
4 Define coefficient of friction and angle of friction. Establish a relation between (5)
them.
5 What do you mean by instantaneous centre of rotation? How can it be located? (5)
6 A man weighing 500 N gets into a 1114. Calculate the force exerted by him on the (5)
floor of the lift when it is:
i) Moving up with an acceleration of 2.5 m/s’and
ii) Moving down with same acceleration.
7 Define stiffness and equivalent stiffness of spring. Give the expression for (5)
equivalent stiffness of spring in series and parallel.
8 What is a simple harmonic motion? Give the expression for the acceleration of (5)
particle executing simple harmonic motion.
PART B
Answer any 2 questions from each SET, each question carries 10 marks.
SETI
9 Find the magnitude and direction of the resultant force, if 30,40,50 and 60 N (10)
forces are acting along the lines joining the centre of a square of side 2m to its
vertices.
10 Two cylinders of weights 400 N and 200 N with radius 2m and 1൩ rest ina (10)
horizontal channel having vertical walls and base width 5.6m as shown in figure
A. Find the reactions at A,B and D.
200 N
86 1 ன்ப. 514५
A | ಹೂ சிட்ட B
2m 1m 2m 1௬ 2m
‏رم مم رر‎ ठ LSS
~ 58m ⋅∙ Fi
Figure A igure B
11 Determine the reactions at the supports of the beam shown in figure 8. (10)

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