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STATICS > LESSON 1 > Flashcards

LESSON 1 Flashcards

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

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.

A

NEWTON’S LAW OF GRAVITATION

25
Q

what is the formula for Newton’s Law of Gravitation?

A

F = (G) m1 m2 / r^2

26
Q

what is the universal constant of gravitation?

A

G = 66.73(10^-12) m^3 / kg(s^2)

27
Q

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.

A

PARALLELOGRAM LAW FOR ADDITION

28
Q

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

A

TRIANGLE LAW or TRIANGULAR LAW OF FORCES

29
Q

law of cosines

A

> 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
Q

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.

A

PRINCIPLE OF TRANSMISSIBILITY

31
Q

what is the SI unit of length?

32
Q

what is the SI unit of time?

33
Q

what is the SI unit of mass?

A

kilogram, kg

34
Q

what is the SI unit of Force?

A

newton, N (kg(m).s^2)

35
Q

what is the US customary (FPS) of length?

36
Q

what is the US customary (FPS) of time?

37
Q

what is the US customary (FPS) of mass?

A

slug, (lb(s^2)/ft)

38
Q

what is the US customary (FPS) of force?

39
Q

what is the equivalent of force (lb) in SI unit?

40
Q

what is the equivalent of mass (slug) in SI unit?

41
Q

what is the equivalent of length (ft) in SI unit?

42
Q

what is the prefix of 10^9?

43
Q

what is the prefix of 10^6?

44
Q

what is the prefix of 10^3?

45
Q

what is the prefix of 10^-3

46
Q

what is the prefix of 10^-6

47
Q

what is the prefix of 10^-9

48
Q

what are the 2 branches under the Mechanics of Rigid Bodies?

A
  1. STATICS
  2. DYNAMICS
49
Q

is the foundation of most engineering sciences and is an indispensable prerequisite to their study

50
Q

how many kilograms are there in 1lb?

A

0.453592 kg

51
Q

how many slugs are there in 1kg?

A

0.0685 slugs

52
Q

how many feet are there in 1 mile?

53
Q

how many quarts are there in 1 gallon?

54
Q

how many inches are there in 1 mile?

A

63,360 inches

55
Q

hi goodluck

STATICS (6 decks)

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