Unit 3: Energy & Society Flashcards
1
Q
Mechanical Work
A
When a force applied to an object displaces the object in the direction of the force or a component of the force
2
Q
Kinetic Energy
A
The energy possessed by moving objects
3
Q
Gravitational Potential Energy
A
The energy possessed by the system object + earth due to the object’s position relative to the surface of the earth
4
Q
Mechanical Energy
A
The sum of kinetic energy and gravitational potential energy
5
Q
Power
A
The rate at which energy is transferred into or out of a system as work
6
Q
Efficiency
A
The ratio of the amount of useful energy produced (energy output) to the amount of energy used (energy input), expressed as a percentage
