Chapter 1 - Conservation and Dissipation of Energy

Question 1

State the 5 different types of energy stores. [5]

Answer 1

• GPE [1]
• EPE [1]
• Thermal Energy [1]
• KE [1]
• Chemical Energy [1]

Question 2

What does the conservation of energy state? [1]

Answer 2

Energy cannot be created or destroyed, only transferred. [1]

Question 3

Define the term ‘closed system’. [1]

Answer 3

• A group of objects where no energy transfer goes in or out of the objects. [1]

Question 4

Describe what happens when a ball is falling from the sky. [2]

Answer 4

The GPE of the ball decreases [1]
and the KE of the ball increases [1]

Question 5

State the equation which links force, distance, and work done. [1]

State the S.I unit of energy. [1]

Answer 5

W = F x D [1]

Joules [1]

Question 6

State the equation that links mass, gfs, and height [1]

Answer 6

GPE = mgh [1]

Question 7

State the equation that links speed, mass, and KE. [1]

Answer 7

KE = 1/2 x m x v(2) [1]

Question 8

Define the 2 types of transferred energy. [2]

Answer 8

Useful energy - Transferred to the desired area. [1]
Wasted energy - Not usefully transferred. [1]

Question 9

Where is the wasted energy from a light bulb transferred to? [2]

Answer 9

The surroundings [1] as heat [1].