Physics Flashcards
Matter
Whatever occupies space and has mass
Atom
Basic unit of chemical elements
Mass
A measure of the quantity of matter in an object
Specific Gravity
The density of that object divided by the density of water
Potential Energy
Energy at rest or stored
Kinetic Energy
Energy in motion
Horsepower
The power an engine produces
Mechanical Advantage
A measure of the comparison of the output force to the input force
MA=OF/IF
Lever
A simple machine made of a rigid beam and a fulcrum
First Class Lever
Fulcrum is located between the effort and resistance
Ex. Seesaw
Second Class Lever
Fulcrum at one end and the effort applied to the other end with resistance in between
Ex. Crowbar
Third Class Lever
Sped up resistance with a large amount of force
Stress
The internal resistance of an object to external forces attempting to strain or deform that object
Celsius
Temperature scale that uses 0 as a freezing point and 100 as a boiling point
Fahrenheit
Uses 32 as the freezing point and 212 as boiling point, 180 divisions between
Thermal Expansion
The expansion of solids, liquids, and gasses when heated
Conduction
The direct transfer of heat from one substance to another substance that it is touching
Convection
The transfer of heat by the movement of a fluid or gas
Specific Heat
The amount of energy required to raise the temperature of 1 gram of a substance by 1 degree celsius
Pressure
The amount of force acting on a specific amount of surface area
Absolute Humidity
The mass of water vapor contained in a certain volume of air
Differential Pressure
The difference between pressures being read at two different locations within a system
Boyles’ Law
The volume of an enclosed dry gas varies inversely with its absolute pressure, provided the temperature remains constant
Volume 1 x Pressure 1 = Volume 2 x Pressure 2
Charles’ Law
Volume 1 x Absolute Temperature 2 = Volume 2 x Absolute Temperature 1
Dalton’s Law
The total atmospheric pressure is equal to the sum of the partial pressure of individual gasses
P = p1 + p2 + p3
Pascal’s Law
The concept of the pressure set up in a fluid, and how it relates to the force acting on the fluid and the surface area through which it acts
Force = Pressure x Area
Bernoulli’s Principle
This inverse relationship between the pressure and speed at a point in a fluid is called Bernoulli’s principle
Aspect Ratio
Ratio between the longer and shorter dimensions
Airfoil
Any device that creates a force when air is caused to flow over the surface of the device
Camber (Upper & Lower
Upper: The more pronounced curvature of a wing
Lower: The relatively flat part of bottom of the wing
Chord line
An imaginary straight line running from the wing’s leading edge to its trailing edge
Relative Wind
A relationship between the direction of airflow and the aircraft wing
Angle of Attack (AOA)
A relationship between the direction of airflow and the aircraft wing
Temp Conversion
Fahrenheit to Celsius
F = 1.8 x C + 32
Temp Conversion
Celsius to Fahrenheit
C = 5(F-32) / 9
Work
Force x Distance
Mechanical Advantage
Force Out / Force In
