Science Projects And Inventions

YOU NEED :

• A piece of thick plastic
• A tub
• Some water
• Some liquid detergent

Cut out of plastic in the shape of a boat bottom, having one side pointed and the other straight. In the

centre of the straight side cut a small ‘V’ shaped notch. Place this shape in a tub of water. The shape will not

move once the water is still. Without shaking the water, carefully  put a drop of detergent in the 'V’ shaped notch

that you had cut earlier. You will see that the piece of plastic begins to move.

HOW DOES IT WORK?

This  happens because the detergent disturbs the surface tension of the water and the plastic moves

Forward.