Energy

Question 1

Types of stored energy

Answer 1

kinetic energy
heat energy
light energy
chemical energy
elastic potential energy or strain energy
gravitational potential energy
electrical energy
magnetic energy
nuclear energy

Question 2

Types of energy transfer

Answer 2

Mechanical work - a force moving an object through a distance
Electrical work - charges moving due to a potential difference
Heating - due to temperature difference caused electrically or by chemical reaction
Radiation - energy transferred as a wave, such as light or sound

Question 3

kinetic energy meaning and equation

Answer 3

kinetic energy is the energy stored in an object due to movement.

kinetic energy = 1/2 x mass x velocity squared

Question 4

GPE meaning and equation

Answer 4

When an object increases in height above ground its GPE increases. The change in GPE also depends on its mass and g (gravitational field strength)

change in gpe = mass x g x change in height

E gpe = mgh

Question 5

equations

Answer 5

gravitational field strength x height = 1/2 x velocity squared