Yes, Gravity is a mystery. Sure, we know a lot about gravity. We know that it is a force that pulls you toward another object, or in our case the Earth. But it is much more complex! Have you ever stopped to think for a moment how much it would affect us to not have gravity here on Earth? Thank goodness for gravity!
Here are some fun facts about gravity!
Did you know that...
* Planets have their spherical shape because of gravity.
* Your mass stays the same no matter where you are. If you are on the moon, your weight is one-sixth your weight on the Earth, but your mass is exactly the same.
* The gravity of the sun is so strong that it holds all nine planets in the solar system in their orbits. Don't forget that the earth is 93 million miles away from the sun- that is a strong gravitational pull!!!
* Gravity is the weakest of the four fundamental forces of the universe!
Let's check it out!
We made a swing using cardboard and string to see how long the eraser would stay in the middle. We slowly started to swing the platform in a circle. We gradually increased its speed until you can swing it overhead without the eraser falling off.
We noticed that the gravitational force kept it held down to the cardboard swing even when we did it fast but the key was to keep it controlled. If something interfered with the consistency or became uncontrolled the eraser went flying off.