EM

Question 1

is a physical science which describes and
predicts the conditions of rest or motion of bodies
under the action of forces. Force, moment and motion
concepts.

Answer 1

Mechanics

Question 2

may be defined as the growth of ideas through
observation and experimentation. In this sense,
the subject does not, necessarily, has to contribute
something to the welfare of the human life,
although the man has received many benefits
from the investigation.

Answer 2

SCIENCE

Question 3

the world of science is so vast that the
present-day scientists and technologists have to
group the various spheres of scientific activities
according to some common characteristics to
facilitate their training and research programs.

Answer 3

APPLIED SCIENCE

Question 4

is that branch of Applied Science, which deals with the laws
and principles of Mechanics, along with their applications to
engineering problems.

Answer 4

ENGINEERING MECHANICS

Question 5

It is that branch of Engineering Mechanics,
which deals with the forces and their effects, while
acting upon the bodies at rest.

Answer 5

Statics

Question 6

It is that branch of Engineering Mechanics,
which deals with the forces and their effects, while acting
upon the bodies in motion.

Answer 6

Dynamics

Question 7

1 inch (in.) to cm

Answer 7

2.54 centimeters (cm.)

Question 8

1 foot (ft.) to inches

Answer 8

12 inches (in.)

Question 9

yard (yd.) to feet

Answer 9

3 feet (ft.)

Question 10

1 mile (mi.) to feet

Answer 10

5280 feet (ft.)

Question 11

1 nautical mile (nmi.) to meters

Answer 11

1852 meters (m.)

Question 12

1 ton (t)

Answer 12

1000 kilograms (kg)

Question 13

1 pound (lb)

Answer 13

16 ounces (oz.)

Question 14

1 ounce (oz)

Answer 14

28.53 g

Question 15

1 minute (min)

Answer 15

60 seconds (sec)

Question 16

1 hour (hr)

Answer 16

60 minutes (min)

Question 17

1 day

Answer 17

24 hours (hr)

Question 18

1 week

Answer 18

7 days

Question 19

1 year

Answer 19

12 months,365 days,366 days, if leap year

Question 20

1 century

Answer 20

100 years

Question 21

1 decade

Answer 21

10 years

Question 22

SYSTEM OF UNITS

Answer 22

1 C.G.S. units

2. F.P.S. units
3. M.K.S. units
4. S.I. units.

Question 23

In this system of units, the fundamental units are meter (m), kilogram
(kg) and second (s) respectively.

Answer 23

S.I Units (International System of Units)

Question 24

(or sometimes known as scalars) are
those quantities which have magnitude only such as length,
mass, time, distance, volume, density, temperature, speed etc.

Answer 24

SCALAR QUANTITIES

Question 25

Calculate the total mass of a 85 kg climber carrying a 15 kg | backpack

Answer 25

Given : 75 kg climber 15 kg backpack Required : Total Mass? Solution : 75 kg + 15 kg = 90 kg

Question 26

(or sometimes known as vectors) are those quantities which have both magnitude and direction such as force, displacement, velocity, acceleration, momentum etc.

Answer 26

The vector quantities

Question 27

is a single force that has the same effect as two or more forces acting together. You can easily calculate the resultant force of two forces that act in a straight line.

Answer 27

resultant force

Question 28

Consider two vectors PQ and RS, which are required to be added, Forming a triangle. This method of adding the two vectors is called

Answer 28

called the Triangle Law of | Addition of Vectors

Question 29

Two vectors can be added to give a resultant; this resultant in turn can be added to a third vector etc., until all the vectors have been added together to give an overall resultant.

Answer 29

Graphically

Question 30

The vectors can be resolved into components that coincide with arbitrarily chosen areas. The components of each vector with respect in these axes can be added algebraically, and resulting additions will be the components of the overall resultant vector.

Answer 30

Analytically

Question 31

Factor and symbol of Yocto

Answer 31

10^-24 y

Question 32

Factor and symbol of Zepto

Answer 32

10^-21 z

Question 33

Factor and symbol of Atto

Answer 33

10^-18 a

Question 34

Factor and symbol of Femto

Answer 34

10^-15 f

Question 35

Factor and symbol of Pico

Answer 35

10^-12 p

Question 36

Factor and symbol of Nano

Answer 36

10^-9 n

Question 37

Factor and symbol of Micro

Answer 37

10^-6 μ

Question 38

Factor and symbol of Milli

Answer 38

10^-3 m

Question 39

Factor and symbol of Centi

Answer 39

10^-2 c

Question 40

Factor and symbol of Deci

Answer 40

10^-1 d

Question 41

Factor and symbol of Deka

Answer 41

10 da

Question 42

Factor and symbol of Hecto

Answer 42

10^2 h

Question 43

Factor and symbol of Kilo

Answer 43

10^3 k

Question 44

Factor and symbol of Mega

Answer 44

10^6 M

Question 45

Factor and symbol of Giga

Answer 45

10^9 G

Question 46

Factor and symbol of Tera

Answer 46

10^12 T

Question 47

Factor and symbol of Peta

Answer 47

10^15 P

Question 48

Factor and symbol of Exa

Answer 48

10^18 E

Question 49

Factor and symbol of Zeta

Answer 49

10^21 Z

Question 50

Factor and symbol of Yota

Answer 50

10^24 Y