Physics 1

Question 1

What are the 8 energy stores?

Answer 1

Thermal / internal energy
Kinetic
Gravitational Potential
Elastic potential
Chemical
Magnetic
Electrostatic
Nuclear

Question 2

Name the 4 ways energy is transferred:

Answer 2

Mechanically (by a force doing work)
Electrically (work done by moving charges)
Heating
Radiation (eg. light or sound)

Question 3

What is a system?

Answer 3

A fancy word for a single object (eg. air in a piston)
OR
a group of objects (eg. colliding vehicles)

Question 4

What happens when a system changes?

Answer 4

Energy is transferred

Question 5

What is a closed system?

Answer 5

A system where neither matter nor energy can enter or leave.
The net change in the total energy of a closed system is always zero.

Question 6

How is energy transferred when boiling water in a kettle?

Answer 6

1) Energy is transferred electrically to the thermal energy store of the kettle’s heating element.
2) The kettle’s heating element transfers energy by heating to the water’s thermal energy store.

Question 7

What is ‘work done’ just another way of saying?

Answer 7

‘Energy transferred’