Materials Required:
- Pencil
- Paper plate with ridges
along the edges - Water faucet
Procedure:
- Push a pencil through the centre of the paper plate, wriggling the pencil back and forth to make the hole loose.
- Turn on the tap water to produce a steady stream. Hold the pencil so that one edge of the plate may touch the water. The plate will spin. Let the water flow out of the faucet at a higher pace and the plate will spin faster.
This is what happens:
You have just built a waterwheel. Waterwheels are used in large rivers and near waterfalls. The water causes the waterwheel to turn, and the turning motion generates electricity. We call this energy hydroelectric power.
