Category : Science Projects And Inventions
YOU NEED :
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
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