Speaker 1: Streaming TV shows and movies directly to your home is
Speaker 1: a breeze with Netflix. As a Netflix member, you can
Speaker 1: instantly watch TV and movies on your PC, Mac, mobile device,
Speaker 1: or television. Get a free thirty day trial membership. Go
Speaker 1: to Netflix dot com, slash stuff and sign up today.
Speaker 1: Welcome to brain Stuff from house stuff works dot com
Speaker 1: where smart happens. Hi this Marshal Brain with today's question,
Speaker 1: how does gravity work? Gravity is a common force of nature.
Speaker 1: We experience it constantly every day and take it completely
Speaker 1: for granted. Newton was the first person to study it seriously,
Speaker 1: and he came up with a law of universal gravitation.
Speaker 1: Every object attracts every other object gravitationally. The standard formula
Speaker 1: for gravity is the mass of the first object times
Speaker 1: the mass of the second object times G, also known
Speaker 1: as the gravitational constant over the distance between those two
Speaker 1: objects squared G is an incredibly small number, but it's
Speaker 1: always there between any two masses. That means that if
Speaker 1: you put to one gram objects one centimeter apart from
Speaker 1: one another, they will attract each other with the force
Speaker 1: of G, which is six point six seven times ten
Speaker 1: to the minus eight dines a dying is equal to
Speaker 1: this incredibly small amount of force point o o one
Speaker 1: gram weight, meaning that if you have a dying of
Speaker 1: force available, it can lift point o o one grams
Speaker 1: in Earth's gravitational field. So six point six seven times
Speaker 1: tend to the minus eighth dine is an incredibly minuscule
Speaker 1: force when you deal with massive bodies like the Earth. However,
Speaker 1: that g number actually adds up to be a big thing,
Speaker 1: because Earth has a mass of six times ten to
Speaker 1: That makes for a very powerful force that holds us
Speaker 1: on the planet. Einstein later came along and redefined gravity,
Speaker 1: so there are now two models, Newtonian and Ironsteinian. Ironsteinian
Speaker 1: gravitational theory has features that allow it to predict the
Speaker 1: motion of light around very massive objects and several other
Speaker 1: interesting phenomena if certain assumptions and simplifications are made. Ienstein's
Speaker 1: equations handle Newtonian gravity as a subset. The question of
Speaker 1: why adams attract one another is still not completely understood.
Speaker 1: For more on this and thousands of other topics, is
Speaker 1: it How staff works? Dot com? Streaming TV shows and
Speaker 1: movies directly to your home is a breeze. With Netflix.
Speaker 1: As a Netflix member, you can instantly watch TV and
Speaker 1: movies on your PC, mac, mobile device, or television. Get
Speaker 1: a free thirty day trial membership. Go to Netflix dot
Speaker 1: com slash stuff and sign up today.