Yr 9 Energy

Question 1

What is the symbol equation for work done?

Answer 1

W = F X s

Question 2

What is the symbol equation for gravitational potential energy?

Answer 2

GPE = M X G X H

Question 3

What is the symbol equation for weight?

Answer 3

W = M X G

Question 4

What is the symbol equation for kinetic energy?

Answer 4

Ek = 0.5 X M X V2

Question 5

What is the symbol equation for elastic potential energy?

Answer 5

Ee = 0.5 X K X E2

Question 6

What is the symbol equation for efficiency?

Answer 6

Useful output over Total input X 100

Question 7

What is the GPE on Earth?

Answer 7

9.8 N/KG

Question 8

Name the four main transfers of energy?

Answer 8

Mechanical working, electrical working, heating by particles, heating by radiation

Question 9

What is the conservation of energy?

Answer 9

Energy cannot be created or destroyed

Question 10

What is a closed system?

Answer 10

When energy (usually thermal) is transferred to the surroundings

Question 11

What is the symbol equation for power?

Answer 11

Energy over time