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REE(Objectives) > Engineering Mechanics 151-200 > Flashcards

Engineering Mechanics 151-200 Flashcards

1
Q
  1. It is the intensity of the force.
A

Magnitude

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2
Q
  1. Sense and slope of angles with respect to reference axes
A

Direction

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3
Q
  1. The resultant of two forces which is the diagonal formed on the vectors of this force.
A

Parallelogram law

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4
Q
  1. Any pressure on the support causes an equal and opposite pressure from the support.
A

Action and reaction

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5
Q
  1. Two forces on a rigid body will in no way to be changed if we added or subtract from them another system of forces in equilibrium.
A

Superposition law

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6
Q
  1. Quantities which possess magnitude.
A

Scalar quantities

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7
Q

157 Quantities having both magnitude and direction.

A

Vector quantities

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8
Q
  1. Quantities which possess magnitude but require two or more directional aspects.
A

tensors

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9
Q
  1. When several forces act in a given situation.
A

System of forces

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10
Q
  1. All forces of the system are in a common line action.
A

collinear forces system

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11
Q
  1. The action line of all the forces are in the same plane and intersect a common point
A

concurrent, coplanar

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12
Q

162.The action line of all the forces of the system are parallel and lie in the same plane

A

parallel, coplanar

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13
Q
  1. The action line of all the forces of the system are in the same plane, but they are not parallel and don’t intersect in a common point.
A

non concurren, coplanar

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14
Q
  1. The action line of all the force are not in the same plane and intersect a common point.
A

concurrent, non-coplanar

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15
Q
  1. The action lines of all the forces of the system are parallel and not all lie in the same plane.
A

Parallel, non-coplanar

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16
Q
  1. The action lines of all forces of the system are all not in the same plane but they are all not parallel do not intersect in a common point.
A

non concurrent, non-coplanar, non-parallel

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17
Q
  1. The simplest force system that can replace the original system without changing its external effect.
A

Resultant

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18
Q
  1. A pair of parallel forces having same magnitude bur opposite senses.
A

Couple

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19
Q
  1. The process of replacing a force system by its resultant
A

composition

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20
Q
  1. A pictorial respresentation in solving a system
A

Graphical

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21
Q
  1. Is used to obatin the magnitude and direction of the resultant of any two concurrent forces.
A

Triangle law

22
Q
  1. An analytical method of finding the resultant of concurrent forces.
A

Resolution

23
Q
  1. Means that either one of two coplanar forces having the given force as resultant.
A

components

24
Q
  1. Is used to check the results obtained from the resoltuion and composition methods.
A

Polygon method

25
Q
  1. Its is a vector quantity that is represented as a vector along the moment axis.
A

Moment of force

26
Q
  1. The algebraic sum of the moment of its forces about any axis perpendiculat to the plane of the couple.
A

The moment of the couple.

27
Q
  1. The force of attraction of the earth on a body
A

Weight

28
Q
  1. Theorem of pappus which state that the surface area of any solid of revolution is the product of the length multiplied by the distance travelled.
A

1st proposition

29
Q
  1. The volume of any solid of revolution is the product of the generation area
A

2nd proposition

30
Q

181 Theorem used in locating the centroid of the semicircle arc.
Pythagorean theorem; Newton’s theorem; Pappus theorem

A

none of the above

31
Q
  1. A system of forces acting on a body which has no resultant.
A

Equilibrium

32
Q
  1. A system of forces acting on a body which has no resultant.
A

Equilibrium

33
Q
  1. It is a skectch of a body completely isolated or free from all other bodies.
A

Free body diagram

34
Q
  1. It is a definite amount of matter the parts of which are fixed in position relative to on another.
A

Rigid body

35
Q
  1. Its is the action exerted by one body upon another.
A

force

36
Q
  1. A unit force
A

Newton

37
Q
  1. The extenal effect of a force in a rigid body is the same for all points along its line of action
A

Principle of transmissiblity of a force

38
Q
  1. The resultant of two forces is the diagonal formed on two vectors of thos forces
A

Parallelogram law

39
Q
  1. The forces are in equilibrium only when equal in magnitude opposite in direction and colinear in action.
A

Axioms of mechanics

40
Q

190 It is a convenient corollary of the parallelogram law.

A

Triangle law

41
Q
  1. The determination of the resultant of 3 or mote concurrent forces that are not colinear.
A

resultantof concurrent, coplanar

42
Q
  1. Addition which is followed by the parallelogram law desscribed by the figure.
A

addition of the vector

43
Q
  1. An object with inertia but of negligible dimension
A

Particle

44
Q
  1. A particle is in equilibrium if the resultant
A

Equilibrium equation for a particle

45
Q
  1. In a rectangular coordinate system, the equilbrium equation can be represented by three sacalar equations.
A

Equilibrium equation in component form

46
Q
  1. A mechanical device that can onlu transmit a tensile force along itself.
A

string or cable

47
Q
  1. A mechanical device that can which exerts a force along its line of its action and propotional of its extension.
A

Linear spring

48
Q
  1. The tension in the cable is the same on both sides of the pulley.
A

Frictionless pulley

49
Q
  1. Each action has a reaction has a reaction equal in magnitude and opposite in direction.
A

newton’s 3rd law

50
Q
  1. Forces and couples which are a result of interaction between one part of an object and another part of it will not appear in the free body diagram of the whole object.
A

Composite bodies and external source

REE(Objectives) (8 decks)

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