Physics Flashcards
Work is the product of which two factors?
Force and the distance moved
What are the parts of a lever?
A rigid bar and the fulcrum
A wheelbarrow is an example of what class lever?
A second-class lever
What is a British Thermal Unit?
The amount of heat energy required to change the temperature of 1 pound of water by 1 degree Fahrenheit
Name the three methods of heat transfer.
Conduction, convection, and radiation
Describe how pressure is transmitted when a force is applied to a liquid.
Pressure is applied equally in all directions
What formula expresses the relationship between force, pressure, and area?
Force equals area times pressure
What is the approximate speed of sound at sea level on a standard day?
661 Knots or 340 meters per second
What are the factors that determine density altitude?
Temperature and atmospheric pressure
What is the term used to describe the ratio between the amount of moisture actually present in the atmosphere as compared to the amount the air could hold if it were completely saturated?
Relative humidity
What are the four principle forces acting on an airplane in flight?
Gravity, lift, thrust, and drag
What is the term that describes the angle between the relative wind and the chord line of an airfoil?
The angle of attack
What are the factors that cause an airplane wing to stall?
A stall is caused when the angle of attack exceeds a critical value and the airflow separates from the upper surface and becomes turbulent.
What are the principle effects that result from lowering the flaps while in flight?
Lift increases, drag increases, and stall speed decreases
What is the function of a wing mounted vortex generator?
Vortex generators delay or keep the airflow from separating from the upper surface of a wing during high-speed flight
