Lesson 9 — Test

• The law of conservation of energy
• Voortgezet speciaal onderwijs
• Leerroute 1

Test energy

2.1 — 2.4

What did we cover yesterday?

The first two laws of Energy

The first two laws of Energy

1) Energy cannot be created or destroyed

The first two laws of Energy

1) Energy cannot be created or destroyed

2) Energy tends to spread out

Newtons Cradle

• Useful energy

• wasted energy

• Efficiency
  

The efficiency of a construction lamp

• A construction lamp uses 80 joules/second
  

• It has an efficiency of 25%

The efficiency of a construction lamp

• A construction lamp uses 80 joules/second
  
• It has an efficiency of 25%

Useful

Wasted

Working independently

Homework (for next week Monday):

The workbook exercises of 2.5 (including E)

Learning goals

• Explain the law of conservation of energy in your own words
  
• Explain what is meant by useful energy and wasted energy
• Explain what is meant by efficiency