Thursday, 19 March 2015

Wind Speed Challenge

Take the Wind Speed Challenge
Anemometer
An anemometer will help show you how fast the wind is going by spinning cups around. The faster the wind is moving the faster the cups will spin.
What you'll need:
  • Paper cups
  • A skewer (or something similar to poke holes)
  • Straws
  • Scissors
  • A marker (felt pen)
  • Tape or glue
The Challenge:
Your challenge is to design something that can measure the wind speed. Create an anemometer that features free spinning cups that spin faster as the wind increases. The wind should blow into the cups pushing them away. The faster the wind the more force it has to push the cups and the faster they spin. You can measure the wind strength by comparing how many times the anemometer spins around every 10 seconds. Does it vary from place to place and day to day?

Wind Speed Box
Make a wind speed box to measure how fast the wind is blowing. Similar in use to the anemometer, your wind box will be able to measure the strength of the wind in different places.
What you'll need:
  • An old shoe box
  • A marker (felt pen)
  • String
  • Tape or glue
  • A piece of card
The Challenge:
The challenge is to make a wind box that can compare different wind speeds. Marking a scale inside the box is a good place to start and you can use the piece of card as a guide, with it swinging further along the scale as the wind increases. The rest is up to you and your problem solving skills. A stronger wind has more force to push the piece of card along the scale, while it might struggle to move it at all on a very calm day.

What's next?
Combine your wind speed results with wind directionair pressure and rain fall for a full weather report.