Energy Flashcards
What is energy typically defined as?
Something that gives us the capacity to perform work
What are the two types of energy?
Potential energy and kinetic energy
Define potential energy.
Energy at rest or energy that is stored
What are the three groups of potential energy?
- Energy due to position
- Energy due to distortion of an elastic body
- Energy which produces work through chemical action
What is an example of energy due to position?
Water in an elevated reservoir or an airplane raised off the ground with jacks
What is an example of energy due to distortion of an elastic body?
A stretched bungee cord or compressed spring
What kind of energy produces work through chemical action?
Energy in aviation gasoline, food, or storage batteries
How much potential energy does a Boeing 747 possess when raised 4 feet?
Depends on the specific calculation of weight and height
What is the BTU content of one pound of aviation gas?
18,900 BTU of heat energy
How much work can one pound of aviation gas produce in foot-pounds?
14,704,200 ft-lb of work
Define kinetic energy.
Energy that is in motion
Give an example of kinetic energy.
An airplane rolling down the runway or a rotating flywheel on an engine
What units do kinetic energy and potential energy share?
Foot-pounds or inch-pounds
Fill in the blank: Mass = weight / _______.
force of gravity
If an aircraft weighs 600,000 pounds and moves at 200 feet per second, what is being calculated?
Foot-pounds of kinetic energy
