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REE(Objectives) > Engineering Mechanics 101-150 > Flashcards

Engineering Mechanics 101-150 Flashcards

1
Q
  1. It is defined as, regardless of the force acting on a fluid, the fluid continues to flow.
A

Newtonian fluid

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2
Q
  1. Which of the following is an example of Newtonian fluid?
    Oobleck;Puddong;Water;Paint
A

Water

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3
Q
  1. If an object is stationary or moving at a constant velocity, then
    No force are acting on the object; The force acting the object are balance; The object is in equilibrium
A

Either of the above

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4
Q
  1. It is an additional force that exactly balances a resultant force.
    Reactant; Equilibrant; Bouyant; Reverse effective force
A

Equilibrant

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5
Q
  1. It is point within an object from which the force of gravity appears to act
    Center of gravity; centriod; Center of mass
A

All of the above

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6
Q
  1. If an area has one line of symmtery the centroid will
A

Lie somewhere along the line symmtery

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7
Q
  1. The second moment of area is an important value which is used to______. It can also be called moment of inertia.
    Determine the state of stress in a section; Calculate the resistance to buckling; determine the amount of deflection in a beam
A

All of the above

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8
Q
  1. The _____ transfers the moemnt of inertia of a section or area from its own centroidal axis to another parallel axis.
A

Transfer formul or Parallel axis theorem

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9
Q
  1. The moment of force is zero when.
    The applied force is zero; the force is applied at the moemnt axis; the line of action of the force is parallel to the moment axis
A

all of the above

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10
Q
  1. The mass moment of inertia of a solid sphere about is diameter is.
A

2/5 mr^2

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11
Q
  1. The mass moment of inertia of a thin spherical shell about its diameter is.
A

2/3 mr^2

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12
Q
  1. It is a mathematical property of a section concerned with a surface area and how that area is distributed about the reference axis.
A

Second moment of area

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13
Q
  1. It is the material’s ability to resist twisting
A

Polar moment of area

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14
Q
  1. “Any objcet, wholly or partly immersed in a fluid, is buoyed up by a force equal to the weight of the fluid displaced by the object” This is known as the
    ‘
A

Archimedes Principle

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15
Q
  1. It is the upward force on an object produced by the surrounding fluid in which it is fully or partially immersed.
A

Buoyancy

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16
Q
  1. If the buoyancy of an object exceeds its weight, the object
A

Tends to rise

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17
Q
  1. It is the rate of change of velocity
A

Acceleration

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18
Q
  1. Impulse is equal to
A

Force x Time or Change in momentum

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19
Q
  1. Collisions in which object rebound with the same speed as they had prior to the collision are known as
A

Elastic collisions

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20
Q
  1. It is defined as the integral of force with respect to time.
A

Impulse

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21
Q
  1. The SI unit for angular velocity is
A

Radians per second

22
Q
  1. The angular momentum of a rotating object can be calculated by the formula.
A

Mass moment of inertia x angular velocity

23
Q
  1. The time derivative of angular momentum is called?
A

Torque

24
Q
  1. It defines limits on how accurately the momentum and position of a single observable system can be known at once.
A

Heisenberg uncertianty principle

25
Q
  1. The SI unit for polar moment of inertia is
A

m^4

26
Q
  1. A structure is ________ when the static equilibrium equations are not sufficient for determining the internal forces and reactions on that structure.
A

Statically determinate

27
Q
  1. It is an equation used to find the final velocity of an object moving with a constant acceleration without having a known time interval.
A

Torricelli’s equation

28
Q
  1. Torricelli’s equation of motion is
A

Vf^2 = Vi^2 + 2as

29
Q
  1. Which of the following is true about centripetal force?
A

It is directed toward the center of the circular path

30
Q
  1. Centripetal acceleration
A

Changes the direction of the velocity

31
Q
  1. Tangential acceleration
A

Changes the magnitude of the velocity

32
Q
  1. The _____ is the primary force from which gravity, electromagnetic and electrostatic manifest.
A

Gforce

33
Q
  1. The value of Gforce is equal to
A

1.211x10^44

34
Q
  1. The gravitational force constant has the units
A

m^3 kg ^-1 s^-2

35
Q
  1. Its is the resistance that occurs when a round object such as a ball or a tire rolls on a flat surface
    Rolling resistance; Rolling friction; Rolling drag
A

Either of the above

36
Q

136 Which of the following affects the magnitude of rolling resistance an object generates?
Type of material; dimension

A

None of the above

37
Q
  1. Rolling resistance coefficient is a dimensionless quantity also known as
A

coefficient of rolling friction

38
Q
  1. The rolling resistance coefficient of fall raod steel wheel on steel rail is
A

0.0002-0.0010

39
Q
  1. The rolling resistance coefficient of ordinary car tires on concrete is
A

0.01-0.015

40
Q
  1. It is the factor by which a mechanism multiplies the force pur into it.
A

Mechanical advantage

41
Q
  1. It is the study that describes the motion of macroscopic objects.
A

Classical mechanics

42
Q
  1. It is the science which deals with bodies in motion or at rest with specific attention being directed primarily to the external effects of a force or a system.
A

mechanics

43
Q
  1. Delas with the conditions of equilibrium of rigid bodies acted upon by a balance systems of forces.
A

Statics

44
Q
  1. Deals with bodies being acted upon by an unbalanced system of forces the resultant of which causes the body to be accelerated.
A

Dynamics

45
Q
  1. Deals with the geometry of motion
A

Kinematics

46
Q
  1. A specific amount of matter all particles of which reamin at fixed distance is each other.
A

Rigid Body

47
Q
  1. Results when a body is acted upon by the force.
A

deformation

48
Q
  1. A fixed body property which determines its resistance to change in motion
A

Mass

49
Q
  1. The action of one body on another body which changes or tends to change the motion of the body acted on.
A

Force

50
Q
  1. Deals with the forces required to produced motion
A

kinetics

REE(Objectives) (8 decks)

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