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| Loop-the-Loop | |
| 摘 要： | You will need:rope, 24 inches (60cm)longpailsoft rubber ballWhen you are on a loop-the-loop, and it turns upside down,why don't you fall out?What to do: Tie the rope securely to the handleof the pail. Put the ball into the pail.Choose a spot where there is no risk ofhitting anything ——outdoors if possible. Holdthe pail by the rope and whirl the pail in circlesin the air as fast as you can.What happens: The ball remains in the paileven when it turns upside down.Why: Centrifugal force —— … |
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