Energy Flashcards
Kinetic energy equation
Ek= 1/2 x mass x velocity2
Gravitation potential energy equation
Ep= mass x gravitational field strength x height
Elastic potential energy equation
Ee= 1/2 x spring constant x extension2
Specific heat capacity equation
E= mass x specific heat capacity x change in tempertaure
Power equation energy
P = Energy/Time
Work done equation
W= Power x time
Stretching an object will give it _______ energy
Elastical potential
As an object falls it loses Ep energy and gains
Kinetic energy
Heating a material…
Transfers the energy to its thermal energy store heating the object up
Specific heat capacity definition
The amount of energy needed to increase an objects temperature by 1 degree
Name every energy store and where they are found
Kinetic- moving objects have kinetic energy
Thermal- all objects have thermal energy, objects at a higher temperature have more
Chemical- Anything that can release energy during a chemical reaction
Elastical potential- Objects that are stretched
Gravitational potential- Anything that is raised
Electrostatic- Charges that attract or repel
Magnetic- Magnets that attract or repel
Nuclear- The nucleus of an atom releases energy
Name the 3 ways energy can be transferred (not kinetic)
Mechanically- when work is done
Electrical- When moving charge does work
Heating- When energy is transferred from a hotter to colder object
What is the conservation of energy
Energy cannot be created or destroyed only transferred from one form to another.
Definition of power
Work done in a given amount of time
Why are lubricants used
When an object moves there are friction forces acting which loses energy to surroundings. Lubricants reduce the friction between surfaces
