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2nd Year College > EM > Flashcards

EM Flashcards

Unit 1 - 2 (Memorization of Conversions of Unit Included)

1
Q

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.

A

Mechanics

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2
Q

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.

A

SCIENCE

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3
Q

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.

A

APPLIED SCIENCE

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4
Q

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

A

ENGINEERING MECHANICS

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5
Q

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

A

Statics

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6
Q

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

A

Dynamics

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7
Q

1 inch (in.) to cm

A

2.54 centimeters (cm.)

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8
Q

1 foot (ft.) to inches

A

12 inches (in.)

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9
Q

yard (yd.) to feet

A

3 feet (ft.)

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10
Q

1 mile (mi.) to feet

A

5280 feet (ft.)

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11
Q

1 nautical mile (nmi.) to meters

A

1852 meters (m.)

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12
Q

1 ton (t)

A

1000 kilograms (kg)

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13
Q

1 pound (lb)

A

16 ounces (oz.)

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14
Q

1 ounce (oz)

A

28.53 g

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15
Q

1 minute (min)

A

60 seconds (sec)

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16
Q

1 hour (hr)

A

60 minutes (min)

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17
Q

1 day

A

24 hours (hr)

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18
Q

1 week

A

7 days

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19
Q

1 year

A

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

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20
Q

1 century

A

100 years

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21
Q

1 decade

A

10 years

22
Q

SYSTEM OF UNITS

A

1 C.G.S. units

  1. F.P.S. units
  2. M.K.S. units
  3. S.I. units.
23
Q

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

A

S.I Units (International System of Units)

24
Q

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

A

SCALAR QUANTITIES

25
Q

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

backpack

A

Given : 75 kg climber
15 kg backpack

Required :

Total Mass?

Solution :

75 kg + 15 kg = 90 kg

26
Q

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

A

The vector quantities

27
Q

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.

A

resultant force

28
Q

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

A

called the Triangle Law of

Addition of Vectors

29
Q

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.

A

Graphically

30
Q

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.

A

Analytically

31
Q

Factor and symbol of Yocto

A

10^-24 y

32
Q

Factor and symbol of Zepto

A

10^-21 z

33
Q

Factor and symbol of Atto

A

10^-18 a

34
Q

Factor and symbol of Femto

A

10^-15 f

35
Q

Factor and symbol of Pico

A

10^-12 p

36
Q

Factor and symbol of Nano

A

10^-9 n

37
Q

Factor and symbol of Micro

A

10^-6 μ

38
Q

Factor and symbol of Milli

A

10^-3 m

39
Q

Factor and symbol of Centi

A

10^-2 c

40
Q

Factor and symbol of Deci

A

10^-1 d

41
Q

Factor and symbol of Deka

A

10 da

42
Q

Factor and symbol of Hecto

A

10^2 h

43
Q

Factor and symbol of Kilo

A

10^3 k

44
Q

Factor and symbol of Mega

A

10^6 M

45
Q

Factor and symbol of Giga

A

10^9 G

46
Q

Factor and symbol of Tera

A

10^12 T

47
Q

Factor and symbol of Peta

A

10^15 P

48
Q

Factor and symbol of Exa

A

10^18 E

49
Q

Factor and symbol of Zeta

A

10^21 Z

50
Q

Factor and symbol of Yota

A

10^24 Y

2nd Year College (7 decks)

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