What is energy?
The ability to do work.
What are the two types of energy?
- Kinetic energy
- Potential energy
What is kinetic energy?
The energy of movement.
What is potential energy?
The energy of position.
What does the conservation of energy state?
The total amount of energy in a closed system is fixed.
What are Sankey diagrams used for?
To depict the transfer of energy between different states and show efficiency.
What is work?
The amount of energy transferred when a task is performed.
What is the equation for work done?
Work done = Force × Displacement.
What additional factor is included when the direction of force differs from displacement?
A cosine term.
What is the formula for kinetic energy?
Kinetic energy = 1/2 × mass × velocity².
What is the formula for gravitational potential energy?
Potential energy = mass × gravitational field strength × height.
What is the formula for elastic potential energy?
Potential energy = 1/2 × force × extension.
What is one Watt equivalent to?
One Joule per second.
How is efficiency defined?
The ratio between the useful energy transferred and total energy transferred.
