energy Flashcards
(5 cards)
1
Q
What is energy?
A
The ability to do work or cause change.
2
Q
What is the principle of conservation of energy?
A
Energy cannot be created or destroyed — only transferred or transformed.
3
Q
What is mechanical energy?
A
The sum of kinetic and potential energy in a system.
4
Q
What is efficiency?
A
The percentage of input energy converted to useful output.
5
Q
Name 3 forms of energy.
A
Examples: Thermal, Electrical, Chemical, Kinetic, Sound, Nuclear, Light.
