PHY102 – Energy, Power & Efficiency Complete
Revision Guide | Equations, Concepts & Examples
A system - An object or a group of objects
Kinetic energy - What is the energy associated with movement?
Elastic potential energy - What type of energy is stored in stretched objects
Nuclear energy - What type of energy is found in the nuclei of atoms?
Gravitational Potential Energy - What type of energy is found in objects raised off the
ground?
Thermal energy - What type of energy is stored as heat?
Chemical energy - What type of energy is found in bonds between substances?
Kinetic energy = 0.5 x mass x speed^2 - What is the equation to work out the kinetic energy of a
moving object?
Elastic potential energy = 0.5 x spring constant x extension^2 - What is the equation to work out
the elastic potential stored in a spring?
Joules (J) - What is the unit for energy?
G.P.E = mass x gravitational field strength x height - What is the equation to work out
gravitational potential energy of an object raised off the ground?
kg - What is mass measured in?
m/s - What is speed measured in?
N/m - What is spring constant (Ek) measured in?
m - What is extension measured in?
0.2m - If an object started at 5cm long and stretched to 25cm then what would be the value for
extension?
N/kg - What is gravitational field strength measured in?
Change in thermal energy = mass x specific heat capacity x temperature change - How can you
calculate the change in thermal energy?
Revision Guide | Equations, Concepts & Examples
A system - An object or a group of objects
Kinetic energy - What is the energy associated with movement?
Elastic potential energy - What type of energy is stored in stretched objects
Nuclear energy - What type of energy is found in the nuclei of atoms?
Gravitational Potential Energy - What type of energy is found in objects raised off the
ground?
Thermal energy - What type of energy is stored as heat?
Chemical energy - What type of energy is found in bonds between substances?
Kinetic energy = 0.5 x mass x speed^2 - What is the equation to work out the kinetic energy of a
moving object?
Elastic potential energy = 0.5 x spring constant x extension^2 - What is the equation to work out
the elastic potential stored in a spring?
Joules (J) - What is the unit for energy?
G.P.E = mass x gravitational field strength x height - What is the equation to work out
gravitational potential energy of an object raised off the ground?
kg - What is mass measured in?
m/s - What is speed measured in?
N/m - What is spring constant (Ek) measured in?
m - What is extension measured in?
0.2m - If an object started at 5cm long and stretched to 25cm then what would be the value for
extension?
N/kg - What is gravitational field strength measured in?
Change in thermal energy = mass x specific heat capacity x temperature change - How can you
calculate the change in thermal energy?
