Reg No.: Name:
0000EST 10012 1903

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
First Semester B.Tech Degree Regular and Supplementary Examination December 2020 (2019 Scheme)

Course Code: EST100
Course Name: ENGINEERING MECHANICS
(2019-Scheme)

Max. Marks: 100 Duration: 3 Hours
PART A
(Answer all questions, each carries 3 marks.)
1 State and explain Lami’s theorem. (3)
2 What is meant by Free body diagram? Explain with an example. (3)
3 A small block of weight 1000 N as shown in Figure, is placed on a 30° inclined (3)

plane with ‏حير‎ 0.25. Determine the horizontal force to be applied for impending
motion down the plane

4 A rigid bar AD is acted upon by forces as shown in figure below. Reduce the (3)
force system to a single force- system and locate the point of application of the

single force. 6 kN 8kN

8 kN 12 kN
5 Find the moment about C(-2,3,5) of the force F= 41+ ೪-3೩೬ passing through (3)
the point A (1,-2,4).
6 Find the centre of gravity of lamina from O. (3)
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7 A 50 kg mass has a velocity of 10m/s horizontally on a smooth surface. (3)
Determine the magnitude of horizontal force required to bring the mass to rest in

5 seconds.

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