OAR Exam Questions with 100% Correct Answers Latest Graded A+
Question:
Scalar
Answer:
quantity that represents only magnitude, e.g., time, temperature, or volume. It is expressed using a
single number, including any units.
Question:
Vector
Answer:
quantity that represents magnitude and direction. It is commonly used to represent displacement,
velocity, acceleration, or force.
Question:
Displacement (s)
Answer:
the distance and direction of a body's movement (an airplane flies east 100 nm).
Question:
Velocity (v)
Answer:
the speed and direction of a body's motion, the rate of change of position (an airplane flies south at
400 knots).
Question:
Speed
Answer:
a scalar equal to the magnitude of the velocity vector.
Question:
Acceleration (a)
,Answer:
the rate and direction of a body's change of velocity (gravity accelerates bodies toward the center of
the earth at 32.174 ft/s2).
Question:
force (F)
Answer:
a push or pull exerted on a body (1,000 lbs of thrust pushes a jet through the sky).
Question:
Mass (m)
Answer:
the quantity of molecular material that comprises an
object.
Question:
Volume (v)
Answer:
the amount of space occupied by an object
Question:
Density (ρ)
Answer:
mass per unit volume. ρ = mass / volume
Question:
Weight (W)
Answer:
the force with which a mass is attracted toward the center of the earth by gravity.
Question:
Force (F)
,Answer:
mass times acceleration. F = mx a
Question:
moment (M)
Answer:
created when a force is applied at some distance from an axis or fulcrum, and tends to produce
rotation about that point.
Question:
Work (W)
Answer:
done when a force acts on a body and moves it. It is a scalar quantity equal to the force (F) times
the distance of displacement (s).
W=Fxs
Question:
Power (P)
Answer:
he rate of doing work or work done per unit of time.
P =W / t
Question:
Energy
Answer:
scalar measure of a body's capacity to do work. There
are two types of energy: potential energy and kinetic energy. Energy cannot be created or
destroyed, but may be transformed from one form to another. This principle is called conservation
of energy. The equation for total energy is:
TE = PE + KE
Question:
, Potential energy (PE)
Answer:
the ability of a body to do work because of its position or state of being. It is a function of mass
(m), gravity (g), and height (h):
PE = weight x height = mgh
Question:
Kinetic energy (KE)
Answer:
the ability of a body to do work because of its motion. It is a function of mass (m) and velocity (V):
KE = ⁄ mV2
Question:
NEWTON'S FIRST LAW - THE LAW OF EQUILIBRIUM
Answer:
"A body at rest tends to remain at rest and a body in motion tends to remain in motion in a straight
line at a constant velocity unless acted upon by some unbalanced force."
Question:
Equilibrium
Answer:
the absence of acceleration, either linear or angular.
Question:
Equilibrium flight
Answer:
exists when the sum of all forces and the sum of all moments around the center of gravity are equal
to zero. An airplane in straight and level flight at a constant velocity is acted upon by four forces:
thrust, drag, lift and weight. When these forces exactly cancel each other out, the airplane is in
equilibrium (Figure 1-3).
Question:
Trimmed flight
Question:
Scalar
Answer:
quantity that represents only magnitude, e.g., time, temperature, or volume. It is expressed using a
single number, including any units.
Question:
Vector
Answer:
quantity that represents magnitude and direction. It is commonly used to represent displacement,
velocity, acceleration, or force.
Question:
Displacement (s)
Answer:
the distance and direction of a body's movement (an airplane flies east 100 nm).
Question:
Velocity (v)
Answer:
the speed and direction of a body's motion, the rate of change of position (an airplane flies south at
400 knots).
Question:
Speed
Answer:
a scalar equal to the magnitude of the velocity vector.
Question:
Acceleration (a)
,Answer:
the rate and direction of a body's change of velocity (gravity accelerates bodies toward the center of
the earth at 32.174 ft/s2).
Question:
force (F)
Answer:
a push or pull exerted on a body (1,000 lbs of thrust pushes a jet through the sky).
Question:
Mass (m)
Answer:
the quantity of molecular material that comprises an
object.
Question:
Volume (v)
Answer:
the amount of space occupied by an object
Question:
Density (ρ)
Answer:
mass per unit volume. ρ = mass / volume
Question:
Weight (W)
Answer:
the force with which a mass is attracted toward the center of the earth by gravity.
Question:
Force (F)
,Answer:
mass times acceleration. F = mx a
Question:
moment (M)
Answer:
created when a force is applied at some distance from an axis or fulcrum, and tends to produce
rotation about that point.
Question:
Work (W)
Answer:
done when a force acts on a body and moves it. It is a scalar quantity equal to the force (F) times
the distance of displacement (s).
W=Fxs
Question:
Power (P)
Answer:
he rate of doing work or work done per unit of time.
P =W / t
Question:
Energy
Answer:
scalar measure of a body's capacity to do work. There
are two types of energy: potential energy and kinetic energy. Energy cannot be created or
destroyed, but may be transformed from one form to another. This principle is called conservation
of energy. The equation for total energy is:
TE = PE + KE
Question:
, Potential energy (PE)
Answer:
the ability of a body to do work because of its position or state of being. It is a function of mass
(m), gravity (g), and height (h):
PE = weight x height = mgh
Question:
Kinetic energy (KE)
Answer:
the ability of a body to do work because of its motion. It is a function of mass (m) and velocity (V):
KE = ⁄ mV2
Question:
NEWTON'S FIRST LAW - THE LAW OF EQUILIBRIUM
Answer:
"A body at rest tends to remain at rest and a body in motion tends to remain in motion in a straight
line at a constant velocity unless acted upon by some unbalanced force."
Question:
Equilibrium
Answer:
the absence of acceleration, either linear or angular.
Question:
Equilibrium flight
Answer:
exists when the sum of all forces and the sum of all moments around the center of gravity are equal
to zero. An airplane in straight and level flight at a constant velocity is acted upon by four forces:
thrust, drag, lift and weight. When these forces exactly cancel each other out, the airplane is in
equilibrium (Figure 1-3).
Question:
Trimmed flight
