Energy And Equations
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Equation for GPE (Short)
E=mgh
Equation for GPE (long)
Gravitational potential energy = mass x gravitational field strength x height
What is Earth’s gravitational field strength?
9.8 N/kg
Equation for kinetic energy (short)
E=0.5mv ²
Equation for kinetic energy (long)
Kinetic Energy = 0.5 x mass x velocity ²
Work done is…
Energy transferred
Units of work done?
Joules
Work done =
Force x distance moved in direction of force
Units of power?
Watts
Power =
Work done/time
Specific heat capacity is…
The amount of energy required to increase the temperature of 1kg of a material by 1 degree
Thermal Energy =
Mass x specific heat capacity x temperature change
Specific heat capacity =
Energy divided by (mass x temperature change)
Thermal energy
Internal energy, heat
Kinetic energy
Movement
Nuclear energy
The energy stored in the nucleus of an atom
Magnetic energy
Stored energy from attracting or repelling poles
Chemical energy
The energy stored in bonds between molecules
GPE (Gravitational potential energy)
Energy of object with height
Elastic energy
Stored energy of a stretched or squished object
Types of energy
Kinetic, Nuclear, Magnetic, Chemical, GPE, Thermal, Elastic, Sound, Light