Basically Engineering Mechanics is the one of the most basic subjects that is required to study mechanical engineering from second year onwards. The subject will expose you to concepts like friction, kinetics, kinematics, resolving forces, trusses etc which forms the crux of design sciences. All these concepts are required to study subjects like Strength of Materials, Theory of Machines I,II , Machine Design, FEA, Mechanical Vibration etc.
2. Introduction of engineering mechanics
Definition of Mechanics and its classifications
Basic concepts
Types of forces
Basic laws of Mechanics
System of units
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2
4. Assessment Level 01:
The motion of a particle round a fixed axis is
1. translatory
2. translatory as well as rotatry
3. rotary
4. circular
Which of the following are vector quantities?
1. Linear acceleration
2. Linear velocity
3. Linear displacement
4. all of these
4
11. Assessment Level 02:
The rate of change of momentum is directly proportional to the impressed force,
and takes place in the same direction in which the force acts. This statement is
known as
1. none of these
2. Newton's first law of motion
3. Newton's third law of motion
4. Newton's second law of motion
If a number of forces are acting at a point, their resultant will be inclined at an
angle with the horizontal, such thatθ
1. tan = ∑Vx∑Vθ
2. tan = ∑Vx∑Hθ
3. tan = ∑V/∑Hθ
4. tan = ∑H/∑Vθ 11
19. Assessment Level 03:
The angular velocity (in rad / s) of a body rotating at N revolutions
per minute is
1. πN/60
2. 2πN/60
3. πN/180
4. 2πN/180
In ideal machines, mechanical advantage is __________ velocity ratio.
1. less than
2. none of these
3. equal to
4. greater than 19
22. Assessment Level 04:
Concurrent forces are those forces whose lines of action
1. none of these
2. meet on the same plane
3. meet at one point
4. lie on the same line
Which of the following is a scalar quantity?
1. Force
2. Velocity
3. Acceleration
4. Speed
22
23. The principle of transmissibility of forces states that, when a force acts upon
a body, its effect is
1. different at different points on its line of action
2. maximum, if it acts at the centre of gravity of the body
3. minimum, if it acts at the centre of gravity of the body
4. same at every point on its line of action
The point, through which the whole weight of the body acts, irrespective of
itsposition, is known as
1. moment of inertia
2. centre of mass
3. centre of percussion
4. centre of gravity 23
Assessment Level 04:
24. 24
Tips to Analyse the problem
Careful reading
Try relate given prob. with actual situation
Redraw ur own figure even its given
Try to superimpose the data
FBD plays vital role
Application of fundamentals principle
Express the requirement mathematical expressions
Always try to reason your answer
Cross verify ur answer by any alternate method