Topic 1: Energy

Question 1

List 8 energy stores

Answer 1

Thermal
Kinetic
Gravitational potential 
Elastic potential 
Chemical 
Magnetic
Electrostatic 
Nuclear

Question 2

What happens when a system changes?

Answer 2

A system is a word for a single object or group of objects

When a system changes, energy is transferred to or away from the system.

Question 3

What is meant by the term “work done”

Answer 3

Work done is another way of saying energy transferred.

Question 4

How do you calculate kinetic energy?

Answer 4

KE=1/2 x mass x speed^2

Question 5

Calculate gravitational potential

Answer 5

GPE=Mass x Gravity strength x height

Question 6

Calculate elastic potential energy

Answer 6

EPE= 1/2 x spring constant x extension^2

Question 7

Name the equation which includes the specific heat capacity

Answer 7

🔼Energy= Mass x SHC x 🔼Temp change

Question 8

What is the specific heat capacity?

Answer 8

Specific heat capacity is the amount of energy needed to raise the temperature of 1kg of substance by 1 degree Celsius

Question 9

Name the two equations what are related to power

Answer 9

Power=energy transferred/ time

Power=work done / time