Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) (CE)- Civil Engineering 2020 December 1st Sem 75351 Mechanics Of Solids Previous Question Paper
Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech (Civil Engg.) (2018 & Onwards) (Sem.?1,2)
MECHANICS OF SOLIDS
Subject Code : BTPH-101-18
M.Code : 75351
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION - B & C . have FOUR ques tions each.
3 .
Attempt any FIVE questions from SECT ION B & C carrying EIGHT marks eac h.
4 .
Select atleast T WO que stions from SECT ION - B & C.
SECTION-A
Write briefly :
1. What are the properties of equipotential surfaces?
2. Differentiate between rotational and irrotational force field.
3. Define Centripetal and Coriolis accelerations.
4. Discuss the energy decay in a damped harmonic oscillator.
5. Write the differential equations of motion for a particle executing simple, damped and
forced oscillations.
6. State the parallel-axis and perpendicular axis theorems of moment of inertia.
7. Define a Rigid Body.
8. Justify the statement, "friction is a necessary evil".
9. Give some methods to increase and decrease friction.
10. State the generalized Hooke's law. How it is different to special form of Hooke's law?
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SECTION-B
11. a) Define the potential energy function (F) and show that F = Grad V.
4
b) Make a summary of different forces in nature.
4
12. Using Newton's laws of motion, deduce the conservation theorems of angular momentum
and energy for the motion of a system of particles.
4,4
13. Discuss the methods (logarithmic decrement, relaxation time and quality factor) for
quantitative measurement of damping effect in a damped simple harmonic oscillator. 3,3,2
14. What are forced oscillations? Establish a differential equation of motion for a forced
harmonic oscillator and obtain an expression of displacement. Discuss the cases of forced
oscillations.
1,5,2
SECTION-C
15. a) Derive the expression for angular momentum about a point of a rigid body in planar
motion.
4
b) Define : Centre of mass and momentum of inertia.
4
16. a) State perpendicular axis theorem of inertia and prove it.
5
b) Derive the expression for the moment of inertia of a circular ring about its centre.
3
17. a) Discuss different types of friction. Why rolling friction is less than kinetic friction? 4
b) State all laws of static and limiting friction.
4
18. a) Define stress and strain and their different types.
5
b) Explain Generalized Hooke's law.
3
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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This post was last modified on 13 February 2021