Minute Physics: What is Gravity?
One Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in one minute! In this episode, we discuss the basic nature of gravity, one of the...
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We're all familiar with gravity as "the reason objects fall", but there's much, much moreto gravity than that.Gravity is a long range attractive force between all objects with mass:it's what keeps us from falling off the earth, it's what keeps the earth in orbit aroundthe sun, and it's what caused the sun itself to form four and a half billion years ago!It's amazing to think that every massive object attracts every other in the universe –that means that your dog, the earth, and a black hole in the Andromeda galaxy 2.5million light years away are all gravitationally attracted to you,and you to them.In the 17th century, Isaac Newton discovered that the strength of the gravitational forcedecreases by the squ...
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We're all familiar with gravity as "the reason objects fall", but there's much, much moreto gravity than that.Gravity is a long range attractive force between all objects with mass:it's what keeps us from falling off the earth, it's what keeps the earth in orbit aroundthe sun, and it's what caused the sun itself to form four and a half billion years ago!It's amazing to think that every massive object attracts every other in the universe –that means that your dog, the earth, and a black hole in the Andromeda galaxy 2.5million light years away are all gravitationally attracted to you,and you to them.In the 17th century, Isaac Newton discovered that the strength of the gravitational forcedecreases by the squ...
