Energy
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What is energy?
Energy is defined as the ability do work or cause change. The units for energy are joules.
Law of Conservation of Energy
Energy can NEVER be CREATED or DESTROYED Instead, energy can be: - Stored for later use. - Transferred from one place to another. - Changed from one form to another.
Kinetic Energy
Motion - the energy of motion/objects in motion
Potential Energy
Stored energy
How to calculate Kinetic Energy?
KE = mass x (velocity)^2
How to calculate Potential Energy?
PE = mass x gravity x height (gravity is 9.8 m/s^2)
Efficiency
The percentage of the desired type of energy that comes out of a process compared to the total of all the energy that went into a process.
How to calculate efficiency?
Eff = (desired energy out) / (total energy in ) x 100
Work
Work is the transfer of energy when a force is applied over a distance
How to calculate how much work is being done?
W = F × d (Work = Force × Distance) Force = mass x acceleration