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Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
B.Tech 51 (Special Improvement) Examination January 2021 (2019 scheme)

Course Code: 0
Course Name: ENGINEERING MECHANICS
(2019-Scheme)

Max. Marks: 100 Duration: 3 Hours
PARTA
(Answer all questions, each carries 3 marks.)
1 A traffic signal of mass 500 N is hung with the help of two strings, as shown ‏سا‎ (3)
fig (Q1) below. Find the forces induced in the strings using Lami’s theorem.
2 State and explain the conditions of equilibrium of coplanar concurrent force (3)
system.
3 Three forces 2014, 3014 and 4014 act along AB, BC and CA respectively, the (3)
three sides of an equilateral triangle ABC. Find the resultant.
+ A block shown in Fig (Q2) is just moved by a force of 200 N. The weight of the (3)
block is 600 N. Determine the coefficient of static friction between the block and
the floor.
ಕ
ഭ്‌
20°
Fig. (01) Fig. (Q2)
5 Write down the expression for centroid of a rectangle about a line passing (3)
through its base.
9 A force F = 2i + 3) - 4k is applied at the point B(1,-1.2). Find the Moment of 3)
inertia of the force about a point A.
7 The angular acceleration of a particle ൨൦ 51 rad/s*. Determine expression for (3)
angular velocity “ര” at any instant ‘t’ of the motion, if the particle starts from
rest.
8 A force of 300N acts on a body of weight SOON. Find the acceleration of the (3)
body by using D’Alembert’s principle.
9 A body performing Simple Harmonic Motion has an amplitude of lm and ೩ (3)

period of oscillation 2.05 seconds. Find the velocity and acceleration of the body

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