Te Reo Physics Resources

Multimedia Physics and Science Teaching Resources


Electricity Generation | Te Mahi Hiko


A primer on the generation and use of electricity in New Zealand.

Principles Illustrated



English version

Te Reo Māori Version


Having students lift the 10 kg mass gives a good indication of how much energy we use. Ask the students what happens to the energy given to the mass if it is lifted quickly. Does it increase, decrease, or stay the same? The energy given to the mass is just mgh and does not depend on how quickly the mass is lifted. Next ask about the power required. The power, which is energy per second, is higher if the mass if lifted quickly. In other words, lifting the mass slowly delivers the energy over a longer time, at lower power. Lifting the mass quickly delivers the same energy in a short time, at higher power.

Other Information


Students need to be careful with the 10 kg mass, ensuring it does not drop on a foot.
Individual teachers are responsible for safety in their own classes. Even familiar demonstrations should be practised and safety-checked by individual teachers before they are used in a classroom.

Notes, Applications, and Further Reading

The data in the images below is from the Ministry of Economic Development:
Note the large increase in the use of wind to generate electricity, from nearly nothing in 2003 to almost 5% in 2013. Note also the increase in the use of geothermal generation.

Electricity Generation 2003
Electricity production in New Zealand in 2003
Electricity Generation 2013
Electricity production in New Zealand in 2013


This teaching resource was developed by the Te Reo Māori Physics Project with support from