Energy Flashcards
Def of kinetic energy
All moving things eg. a roallarcoaster
Def of thermal energy
The energy of a substance or an object store because of its temp
Eg. Hot chocolate
Def of elastic potential energy
The energy stored in a springy object when you stretch or squash it
Eg. A hairband
Def of gravitational potential energy
The energy stored in an object because of it’s position above the ground
Eg. Bungee jumping
Is energy ever used up?
NO, it is just transferred between objects
Def of mechanical working
-Includes soundwaves
-involves a force
-surfaces being in contact
Def of electrical working
-via current(through wires)
Def of heating by particles
-heat moving from one place to another via conduction and convention
Def of heating by radiation
-heat radiation
-any electromagnetic waves (light waves)
What is the principle of conservation of energy
ENERGY CANNOT BE CREATED OF DESTROYED only transferred from one store to another
What stores of energy does a kettle boiling go through
Electrical working>thermal/internal energy store of the heating element>heating by particles>thermal/internal energy store of the water
What stores of energy does a ball thrown in the air go through
Chemical energy store of the arm muscles>mechanical working>kinetic energy store of the arm and the ball>mechanical working> gravitational potential>gravitational potential energy store of the ball
What stores of energy does a car braking go through
Gravitational potential energy store of the ball>mechanical working>kinetic energy store of the ball
Energy transferred = ?
Work done
W= ?
WORK measured in J, joules
F=?
FORCE measured in N, newtons
S=?
DISTANCE
How do u find W?
W=fxs
