P1

Question 1

Kinetic energy

Answer 1

Moving objects have energy in their kinetic store

Question 2

Gravitational energy

Answer 2

Objects gain energy in their gravitational potential store when they are lifted through a gravitational field

Question 3

Elastic energy

Answer 3

Objects have energy in their elastic potential store if they are stretched, squashed or bent

Question 4

Magnetic energy

Answer 4

Magnetic materials interacting with each other have energy in their magnetic store

Question 5

Electrostatic energy

Answer 5

Objects with charge (like electrons and protons) interacting with one another have energy in their electrostatic store

Question 6

Chemical energy

Answer 6

Chemical reactions transfer energy into or away from a substance’s chemical store

Question 7

Nuclear energy

Answer 7

Atomic nuclei release energy from their nuclear store during nuclear reactions

Question 8

Thermal energy

Answer 8

All objects have energy in their thermal store, the hotter the object, the more energy it has in this store

Question 9

Mechanical working

Answer 9

When a force acts on an object (e.g. pulling, pushing, stretching, squashing)

Question 10

Electrical working

Answer 10

A charge moving through a potential difference (e.g. current)

Question 11

Heating (by particles)

Answer 11

Energy is transferred from a hotter object to a colder one (e.g. conduction)

Question 12

(Heating by) radiation

Answer 12

Energy transferred by electromagnetic waves (e.g. visible light)

Question 13

Definition of kinetic store

Answer 13

The amount of energy an object has as a result of its mass and speed

Question 14

Equation of kinetic energy

Answer 14

Ek = ½ × m × v2

Question 15

Definition of gravitaional store

Answer 15

The energy an object has due to its height in a gravitational field

Question 16

Equation of gravitational store

Answer 16

Ep = m × g × h

Question 17

What is the gravitational feild strength on earth

Answer 17

9.8 N/Kg

Question 18

Definition of elastic potential store?

Answer 18

The energy stored in an elastic object when work is done on the object

Question 19

Equation of elastic potentional energy?

Answer 19

Ee = ½ × k × e2

Question 20

Equation of thermal energy

Answer 20

ΔE = mcΔθ

Question 21

What is specific heat capacity of a substance?

Answer 21

The amount of energy required to raise the temperature of 1 kg of a substance by 1 °C