Conservation & Dissipation Of Energy

Question 1

Name 4 ways in which energy can be transferred:

Answer 1

• by heating
• waves
• electric current
• when a force moves an object

Question 2

Chemical energy stores include WHAT?

Answer 2

Fuels, foods, or the chemicals found in batteries

Question 3

What is kinetic energy?

Answer 3

Kinetic energy stores describe the energy an object has because it is moving

For example: car

Question 4

What is Gravitational Potential Energy? (GPE)

Answer 4

Their stores are used to describe the energy stores in an object because of its position SUCH AS an object above the ground

Question 5

What is elastic potential energy?

Answer 5

Their stores describe the energy stored in a springy object when you stretch or squash it.

For example: elastic band

Question 6

What is thermal energy?

Answer 6

Their stores describe the energy a substance has because of its temperature

Example: Sun

Question 7

What is ‘closed system’?

Answer 7

System in which NO energy transfers take place out of OR into the energy stores of the system

Question 8

Energy transferred = ?

Answer 8

Work done

Question 9

What is the equation for work done?

Answer 9

Work done (J) = force applied (N) x distance moved along the line of action of the force (m)