Saturday, April 18, 2009
Gravity is the force that cause an object with mass can pull everything around it. In the 17th centery, scientist Isaac Newton understand it by watching a falling apple. This force affects everything and every where. For example, the gravity of the sun causes the motion of the solar system. Gravity lets us stand or fall. Without gravity, we will fly straight to space and planets and stars will move in lines. For sure we can say gravity is the foremost force in our lives.