Basic Physics

Question 1

Define matter

Answer 1

Any substance that occupies space and has mass

Question 2

Matter may exist in what three states

Answer 2

Solid liquid gas

Question 3

What is meant by pressure

Answer 3

Force that acts on a unit of area

Question 4

Define kinetic energy

Answer 4

Kinetic energy is energy in motion

Question 5

Work is the product of what two factors

Answer 5

Force in the distance moved

Question 6

What are the parts of a lever

Answer 6

A rigid bar, and a pivot point called a fulcrum

Question 7

A wheelbarrow is an example of what class of lever

Answer 7

Second class lever

Question 8

What is meant by the fulcrum of a lever

Answer 8

The point about which the lever rotates

Question 9

A seesaw is an example of what class of lever

Answer 9

A first class lever

Question 10

What is meant by the density of air

Answer 10

The weight of a given volume of air

Question 11

What characteristic of the atmosphere determines the speed of sound?

Answer 11

Temperature

Question 12

Are liquid compressible

Answer 12

No liquids are not considered compressible

Question 13

Are all three states of matter affected by thermal expansion, and if so, which state is affected most

Answer 13

All three states of matter are affected with gases being affected the most

Question 14

What is a British thermal unit?

Answer 14

The amount of heat energy required to change the temperature of 1 pound of water, 1°F

Question 15

Name the three methods of heat transfer

Answer 15

Conduction, convection, and radiation

Question 16

What time to find the temperature at which all molecule motion ceases?

Answer 16

Absolute zero

Question 17

What is meant by the term absolute zero

Answer 17

The temperature at which all molecular motion ceases

Question 18

What are the customary units used to express hydraulic or pneumatic pressure in the United Stats

Answer 18

PSI, pounds per square inch

Question 19

Describe how pressure is transmitted when a force is applied to a confined fluid

Answer 19

Pressure is transmitted equally in all directions

Question 20

What formula expresses the relationship between force pressure and area

Answer 20

Force equals area times pressure

Question 21

What is the approximate speed of sound at sea level on a standard day?

Answer 21

661 knots or 750 mph

Question 22

What is the atmospheric pressure at? Sea level on a standard day?

Answer 22

29.92 inches of mercury

Question 23

What is the temperature on a standard day at sea level

Answer 23

59°F or 15°C

Question 24

What are the factors that determine density altitude?

Answer 24

Temperature in atmospheric pressure

Question 25

What is the term used to describe the ratio between the amount of moisture actually presented in the atmosphere as compared to the amount the air could hold if it were completely saturated

Answer 25

Relative humidity

Question 26

What are the four principal forces acting on an airplane in flight?

Answer 26

Lift, drag, thrust, and gravity

Question 27

What is the term that describes the angle between relative win and the cord line of an airfoil?

Answer 27

Angle of attack

Question 28

What are the factors that cause an airplane wing to stall?

Answer 28

Stall is caused when the angle of attack exceeds a critical value, and the air flow separate from the upper surface and becomes turbulent

Question 29

What are the principal effects that result from lowering the flaps in flight

Answer 29

Lift increases, drag increases, stall speeds decrease

Question 30

What is the function of a wing mounted Vortx generator?

Answer 30

Vortx generators delay or keep the airflow from separating from the upper surface of the wing during high-speed flight

Question 31

How does blade flapping help to compensate for dissymmetry of lift and a helicopter main rotor system?

Answer 31

Blade flapping serve to increase the angle of a tact and lift on the retreating blade side of the rotor, and decreases the angle of attack and lift on the advancing blade side

Question 32

How does the airflow through the main rotor of a helicopter change during the transition from normal flight to auto rotation?

Answer 32

During normal flight, the air moves downward, and during auto rotation, the air moves upward

Question 33

What is friction?

Answer 33

The opposition to relative motion between two objects in contact with each other