Hello, little scientists, I am Professor Bill Tyson and together we are going to know different forms of science. In our last episode we talked about the concept of Strength, and that there are several types of force. Let's talk about one of these forces today.
The Gravity. You sure have seen gravity acting. To see its effect is to just throw a simple object to the top .
. . and it will fall.
But gravity does not only mean that things fall, but that they are attracted. I'll show you. Gravity is one of nature's four fundamental forces.
She is the force of attraction between two bodies. It is enough for a body to have mass that it causes gravity, and the larger the mass of a body the greater its attractiveness, or its gravitational force. But if a body with greater mass causes greater gravity, why does an elephant, which has enough mass, not attract an ant that has little mass?
Because both the elephant and the ant are being attracted to something with a much larger mass, the Earth. This is why objects when released into the air fall. In fact they are drawn to the center of the Earth.
Everything on Earth has a mass less than that of our planet, so the mass of the Earth attracts everything that is on it. So, because of Earth's gravity, everything on it does not fly through space, no matter how fast our planet moves. For now, it's just personal, see you next time.
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