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WIND UP A WINDMILL

Make a windmill do some simple work for you

Suitable For

Grade 6

Difficulty

2

Time Required

 <12 Hours

Supervision

Required

What’s it about?

There are many ways to utilize the power of the wind or ‘moving air’. A windmill is such a device and has been used since the seventh century to help humans to do work. Early windmills used the wind to turn blades that rotated grindstones inside a mill. Various grains such as wheat and corn were ground with these grindstones to produce flour for baking bread. These days, a type of ‘windmill’ is also used to generate electricity. In this science experiment, try to build your own windmill to do some simple ‘work’:

Topics covered

Windmill, Kinetic energy, Electric generator

What will I need?

  • PLASTIC LID FROM ICE CREAM TUB
  • NAIL
  • GLUE
  • DRINKING STRAW
  • SCISSORS
  • STRING
  • WEIGHT (WASHERS)

Procedure (Method)

Unfortunately, this section is only available in the e-book version of the project.

How does it work?

Unfortunately, this section is only available in the e-book version of the project.

This science experiment works because the windmill blades use kinetic energy of the air to turn or do ‘work’. Kinetic energy is the energy of moving objects. The kinetic energy of the moving air turns the blades of your windmill. The blades turn the nail, and the turning motion of the nail lifts the bolt. If a ‘windmill’ would be connected to a device called an ‘electric generator’, the kinetic energy of the wind can be converted to electricity.

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