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LESSON 1 Flashcards

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1
Q

can be defined as the science which describes and predicts the conditions of rest or motion of bodies under the action of forces.

A

MECHANICS

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2
Q

what are the three types of mechanics?

A
  1. MECHANICS OF DEFORMABLE BODIES
  2. MECHANICS OF RIGID BODIES
  3. MECHANICS OF FLUIDS
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3
Q

dealing with bodies at rest

A

STATICS

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4
Q

dealing with bodies in motion

A

DYNAMICS

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5
Q

what are the four basic concepts used in mechanics?

A
  1. SPACE
  2. TIME
  3. MASS
  4. FORCE
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6
Q

has only magnitude, but no direction

A

SCALAR QUANTITY

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7
Q

cannot be resolved as it has exactly same value regardless of direction

A

SCALAR QUANTITY

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8
Q

give examples of scalar quantity

A

LENGTH, MASS, ENERGY, DENSITY

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9
Q

any change in __________ is the reflection of change in magnitude

A

SCALAR QUANTITY

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10
Q

has both magnitude and direction

A

VECTOR QUANTITY

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11
Q

can be resolved in any direction using sine or cosine of the adjacent angle

A

VECTOR QUANTITY

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12
Q

give examples of vector quantity

A

DISPLACEMENT, VELOCITY, ACCELERATION, FORCE

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13
Q

is the geometric region occupied by bodies whose positions are described by linear and angular measurements relative to a coordinate system

A

SPACE

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14
Q

is the measure of the succession of events and is a basic quantity in dynamics

A

TIME

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15
Q

is a measure of the inertia of a body, which is its resistance to a change of velocity

A

MASS

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16
Q

is the action of one body on another

A

FORCE

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17
Q

is a body of negligible dimensions

A

PARTICLE

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18
Q

a body is considered rigid when __________________________

A

THE CHANGE IN DISTANCE BETWEEN ANY TWO OF ITS POINTS IS NEGLIGIBLE FOR THE PURPOSE AT HAND.

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19
Q

defined as that which changes, or tends to change, the state of motion of a body.

A

FORCE

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20
Q

what are the 3 characteristics of force?

A
  1. ITS MAGNITUDE
  2. THE POSITION OF ITS LINE OF ACTION
  3. THE DIRECTION IN WHICH THE FORCE ACTS ALONG ITS LINE OF ACTION
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21
Q

If the resultant force acting on a particle is zero, the particle will remain at rest (if originally at rest) or will move at a constant speed in a straight line (if originally in motion)

A

NEWTON’S FIRST LAW OF MOTION:
LAW OF INERTIA

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22
Q

If the resultant force acting on a particle is not zero, the particle will have an acceleration proportional to the magnitude of the resultant and in the direction of this resultant force

A

NEWTON’S SECOND LAW OF MOTION:
LAW OF ACCELERATION

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23
Q

The forces of action and reaction between bodies in contact have the same magnitude, same line of action, and opposite sense

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A

NEWTON’S THIRD LAW OF MOTION:
LAW OF ACTION AND REACTION

24
Q

This states that two particles of mass M and m mutually attracted with equal and opposite forces F and -F of magnitude F.

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A

NEWTON’S LAW OF GRAVITATION

25
what is the formula for Newton's Law of Gravitation?
F = (G) m1 m2 / r^2
26
what is the universal constant of gravitation?
G = 66.73(10^-12) m^3 / kg(s^2)
27
This states that two forces acting on a particle may be replaced by a single force, called their resultant, obtained by drawing the diagonal of the parallelogram which has sides equal to the given forces.
PARALLELOGRAM LAW FOR ADDITION
28
this states that if there are two forces which are congregation or transient through a point then the third or enclosing side of a triangle is such that
TRIANGLE LAW or TRIANGULAR LAW OF FORCES
29
law of cosines
> a^2 = b^2 + c^2 - 2bc(cos)a > b^2 = c^2 + a^2 - 2ca(cos)b > c^2 = a^2 + b^2 - 2ab(cos)c
30
this states that the conditions of equilibrium or of motion of a rigid body will remain unchanged if a force acting at a given point of the rigid body is replaced by a force of the same magnitude and same direction, but acting at a different point, provided that the two forces have the same line of action.
PRINCIPLE OF TRANSMISSIBILITY
31
what is the SI unit of length?
meter, m
32
what is the SI unit of time?
second, s
33
what is the SI unit of mass?
kilogram, kg
34
what is the SI unit of Force?
newton, N (kg(m).s^2)
35
what is the US customary (FPS) of length?
foot, ft
36
what is the US customary (FPS) of time?
second, s
37
what is the US customary (FPS) of mass?
slug, (lb(s^2)/ft)
38
what is the US customary (FPS) of force?
POUND, lb
39
what is the equivalent of force (lb) in SI unit?
4.448 N
40
what is the equivalent of mass (slug) in SI unit?
14.59 kg
41
what is the equivalent of length (ft) in SI unit?
0.3048 m
42
what is the prefix of 10^9?
GIGA, G
43
what is the prefix of 10^6?
MEGA, M
44
what is the prefix of 10^3?
KILO, k
45
what is the prefix of 10^-3
MILLI, m
46
what is the prefix of 10^-6
MICRO, u
47
what is the prefix of 10^-9
NANO, n
48
what are the 2 branches under the Mechanics of Rigid Bodies?
1. STATICS 2. DYNAMICS
49
is the foundation of most engineering sciences and is an indispensable prerequisite to their study
MECHANICS
50
how many kilograms are there in 1lb?
0.453592 kg
51
how many slugs are there in 1kg?
0.0685 slugs
52
how many feet are there in 1 mile?
5280 ft
53
how many quarts are there in 1 gallon?
4 quarts
54
how many inches are there in 1 mile?
63,360 inches
55
hi goodluck
go bes!

STATICS (6 decks)

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