Download OU B-Tech First Year 2014 June 6007 Engineering Mechanics Question Paper

Download OU (Osmania University) B.Tech (Bachelor of Technology) First Year (1st Year) 2014 June 6007 Engineering Mechanics Question Paper

Code No. 6007 / M
FACULTY OF ENGINEERING AND INFORMATICS
B.E. I ? Year (Main) Examination, June 2014
Subject : Engineering Mechanics
Time : 3 hours
Max. Marks : 75
Note: Answer all questions from Part-A. Answer any FIVE questions from Part-B.
PART A (25 Marks)
1 State the principle of Transmissibility?
2
2 Following forces act at a point P, F1 = 501 F2 = 301 ? 15j F3 = 20i + 10j ? 5k.
Determine the resultant.
3
3 Differentiate center of gravity and centroid.
2
4 Explain the difference between angle of friction and angle of repose.
3
5 State Parallel Axis theorem.
2
6 Find moment of inertia of a rectangular section about its base la'.
3
7 Differentiate kinematics and kinetics.
2
8 The rectilinear motion of a particle is defined by the displacement-time equation as
x = x0 + vo t +
I
at
2
. Find the displacement and velocity at time t = 2.58 while
2
xo = 300 mm, vo = 110 mm/sec and a = 0.55 m/s
2
. 3
9 The kinetic energy of rotating body depends on and 2
10 Define the term natural frequency and angular frequency. 3
PART ? B (50 Marks)
11 Neglecting thickness and mass of the beam, determine the support reactions on the
beam loaded as shown below. 10
KA
05104 ta5
2,
1
4,
1
04

2.rn
dt
Akirft
3
,
r4
12 Find the centroid of the shaded portion of the section shown in the fig below after a
square is cut out from it? 10
2
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Code No. 6007 / M
FACULTY OF ENGINEERING AND INFORMATICS
B.E. I ? Year (Main) Examination, June 2014
Subject : Engineering Mechanics
Time : 3 hours
Max. Marks : 75
Note: Answer all questions from Part-A. Answer any FIVE questions from Part-B.
PART A (25 Marks)
1 State the principle of Transmissibility?
2
2 Following forces act at a point P, F1 = 501 F2 = 301 ? 15j F3 = 20i + 10j ? 5k.
Determine the resultant.
3
3 Differentiate center of gravity and centroid.
2
4 Explain the difference between angle of friction and angle of repose.
3
5 State Parallel Axis theorem.
2
6 Find moment of inertia of a rectangular section about its base la'.
3
7 Differentiate kinematics and kinetics.
2
8 The rectilinear motion of a particle is defined by the displacement-time equation as
x = x0 + vo t +
I
at
2
. Find the displacement and velocity at time t = 2.58 while
2
xo = 300 mm, vo = 110 mm/sec and a = 0.55 m/s
2
. 3
9 The kinetic energy of rotating body depends on and 2
10 Define the term natural frequency and angular frequency. 3
PART ? B (50 Marks)
11 Neglecting thickness and mass of the beam, determine the support reactions on the
beam loaded as shown below. 10
KA
05104 ta5
2,
1
4,
1
04

2.rn
dt
Akirft
3
,
r4
12 Find the centroid of the shaded portion of the section shown in the fig below after a
square is cut out from it? 10
2
Code No. 6007 / M
- 2 -
13 Find the expression for the moment of inertia of a circle about its diametral axes.
14 A uniform square plate ABCD rests on one of the corners A an rough horizontal floor
having co-efficient of friction 0.23 and another corner B on rough vertical wall having co-
efficient of friction 0.25. Find the inclination of the edge AB of the plate with horizontal.
15 a) Write a short note on fixed axis rotation of a rigid body.
b) Two blocks as shown in the fig. below slide down a 27
?
incline. If co-efficient of
friction at all contiguous surfaces are 0.22. Determine the pressure between the
blocks. Take MA = 25 kg and MB=-30 kg.
16 Two blocks A and B are connected with an inextensible but flexible string as shown
below. Let the system is released from rest. Determine the velocity of the block A after
it has moved a distance of 0.5m. Assume the co-efficient of friction between block A
and the plane is 0.3. Mosses of the blocks are MA = 80 kg; MB = 150 kg.
17 In a particular SHM performed by a particle of mass m, the amplitude is 160cm and time
period of oscillation is 1 sec. Determine the time required by the particle to pass two
points at 1.4 m away and at 0.5m away from the central point of oscillation. Both the
points lie on the same side of this central point.
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