Science Projects And Inventions

YOU NEED :

• An empty plastic bottle

• A sharp pencil

Gravity disappears inside a freely falling container. This is one trick that should preferably be performed

outdoors.

Make two holes on opposite sides of a plastic bottle near the bottom with a sharp pencil. Fill the bottle with

water having put your thumb and forefinger over the holes.

Should you remove your thumb and forefinger, gravity will force the water to come out.

Interestingly, if you hold the bottle at a height and let it fall, the water will remain in the bottle.

It is much like a spacecraft as it orbits Earth.

HOW DOES IT WORK?

In a gravitational field, everything falls at the same speed no matter what its weight is or what it is made of.

In this particular experiment, the water does not come out because both the water and the plastic bottle

plummet at the same speed.

In a spacecraft orbiting the Earth, what is inside, in effect is falling towards the Earth, at the same speed.

So, if you happen to be in the spacecraft and drop a bottle of water, it will be suspended right where you

 let it go. The water will not leak out either, simply because you, the bottle, and the water are falling towards

the Earth at the same speed.