الخميس، 11 يوليو 2013

Who discovered Gravity?


Gravity was discovered 3 centuries ago by a mathematician and physicist named Sir Isaac Newton. He discovered that there is a specific force,which we call gravity, that is required to change the speed or direction of something that is moving. This same force he figured must cause apples to fall from trees! After researching this hypothesis he wrote the law of gravity. This law is a mathematical explanation for the way that things attract based on experiments and observations

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