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2006-08-05 22:06:09 · 18 answers · asked by discover 2 in Science & Mathematics Physics

18 answers

Centrifugal force offsets gravity.

2006-08-05 22:09:43 · answer #1 · answered by druid 7 · 0 0

The moon orbits the sun. The Earth orbits the sun. The sun, supposedly orbits a black hole in the centre of the galaxy. That aside, the moon orbits the sun, but its unlucky. Why is it unlucky? Because it has a huge *** brother next to it (us), and then it's orbit gets all messed up by us (sob). But while its orbiting the sun, it doesn't want to crush in with us, or pay us a visit anytime soon. So by an extraordinary chance, it just so happens to orbit us at such a velocity that it still swings around the sun fast enough to not fall to us, but not fast enough to escape our gravity. The same goes for us. Just fast enough to circle the sun and do a dance with the moon, but not fast enough to fly us to the moon, and let me play among the stars... But then, wait. Space isn't a vacuum, and that means the moon, the earth, and the sun (shock! its "orbiting" us too!!!) are constnatly hitting on some cutie atom (how're'u doin'), which slows us down ever so slightly. Over time, our velocity drops below this ideal dance, and like so many dancing couples, we will eventually smash into each other and burn to death.

2006-08-05 22:31:14 · answer #2 · answered by Anonymous · 0 0

The moon really is falling to the Earth!!

This is kinda a different way to explain it without balls and strings...

Here's the deal, the moon is falling but its also moving perpendicular really fast. Its actually moving slightly faster than its falling.

O ------->
|
|
V

So the moon is constantly missing the Earth. This is called an orbit. Its the same thing that astronauts on the space shuttle are doing. They're constantly falling but they're moving so fast that they miss hitting the Earth.

This also explains why they experience weightlessness on the spaceship. There's gravity out there in space but since they're always falling, they don't experience it (think of going down a big hill on a roller coaster)

2006-08-05 22:14:16 · answer #3 · answered by John H 3 · 0 0

I won't bore you with math, since it seems as if you are looking for a general answer.

The moon is moving. That's why it doesn't fall to Earth. Imagine you have a ball on a string. If you spin around, you feel the ball pull on the string. This is exactly what is happening with the moon, except instead of a string the moon has Earth's gravity.

When objects move in a circular path they need a force acting towards the center to hold them on this path.

2006-08-05 22:12:37 · answer #4 · answered by polloloco.rb67 4 · 0 0

In physics, gravitation or gravity is the tendency of objects with mass to accelerate toward each other. Gravitation is one of the four fundamental interactions in nature, the other three being the electromagnetic force, the weak nuclear force, and the strong nuclear force. Gravitation is the weakest of these interactions, but acts over great distances and is always attractive. In classical mechanics, gravitation arises out of the force of gravity (which is often used as a synonym for gravitation). In general relativity, gravitation arises out of spacetime being curved by the presence of mass, and is not a force. In quantum gravity theories, either the graviton is the postulated carrier of the gravitational force[1], or time-space itself is envisioned as discrete in nature, or both.

The gravitational attraction of the earth endows objects with weight and causes them to fall to the ground when dropped (the earth also moves toward the object, but only by an infinitesimal amount). Moreover, gravitation is the reason for the very existence of the earth, the sun and other celestial bodies; without it matter would not have coalesced into these bodies and life as we know it would not exist. Gravitation is also responsible for keeping the earth and the other planets in their orbits around the sun, the moon in its orbit around the earth, for the formation of tides, and for various other natural phenomena that we observe.

2006-08-05 23:50:27 · answer #5 · answered by Miss LaStrange 5 · 0 0

An object moving constantly in a circular path is governed by 2 forces.

One is the outward force which pushes it away from the centre. Its called "centrifugal force." Its gained by any body moving in a circular path. The body tries to move tangential from the path.

The other force is required to avoid the body from going away from centre and keep the body in circular path. That force is a pull on the object towards its centre. Its called as "centripetal force." It pulls the object towards the centre.

When these two forces are equal in magnitude, they balance the body and remains in the same circular path. Since the moon gets centrifugal force by rotation and centripetal force is provided by gravitational force of the earth, it remains in its orbit and doesn't come near or go far from earth.

2006-08-06 04:40:13 · answer #6 · answered by rahulthesweet 3 · 0 0

because of the momentum that the moon is spinning round the earth is balancing the gravitational pull from earth, plus the gravity is keeping the moon from sling shoting out into space

additionaly it dosne't look like its traveling round the earth because the earth is rotating at a relativly same speed

2006-08-05 22:11:16 · answer #7 · answered by AzN 3 · 0 0

hi, its an rather stable question! initially, even the ISS is experiencing the gravitational stress of Earth in simple terms like the moon does. yet as its an inverse sq. regulation, the stress of charm experienced by using ISS simply by Earth's gravity might desire to be sligtly much less or around that of moon because of the fact the stress of charm relies upon in the present day on the made of the loads ( moon's mass is super in assessment to ISS) and relies upon inversely on the sq. of distance of separation ( ISS lots close in assessment to Moon). Its the Earth's gravity simply by which ISS/Moon is of their respective orbits. you may desire to have theory on the subject of the so referred to as weightlessness on ISS and subsequently concluding that gravity isnt there.. ISS is in consistent acceleration ( Centripetal acceleration wrt to Earth) and subsequently weigtlessness arises. the explanation why ISS/Moon doesnt fall on earth is they are holding a minimum velocity element referred to as because of the fact the extreme velocity or orbital velocity which equals to squarert (GM/R) the place G is the prevalent Gravitation Const, M is mass of Earth and R is the area of separation between 2 bodies. as long as any merchandise keeps that velocity at that distinctive top, it is going to stay in orbit and wont fall!

2016-12-11 07:54:51 · answer #8 · answered by Anonymous · 0 0

the moon wants to fly off away from earth at a tangent. gravity stops it from doing so & it "appears" to have a circlular trajectory around the earth. thanks to the force of gravity being streonger than the force of the moon flying off, the moon stays locked in orbit around earth. in billions of years time the moon will crash to earth as it is in a decaying orbit

2006-08-05 22:13:51 · answer #9 · answered by hornbag1970 1 · 0 0

The moon is in a orbit around the earth. It has its own elliptical trajectory that it follows in cycles for eternity!

2006-08-05 22:10:10 · answer #10 · answered by azurecuzyeah 2 · 0 0

It is not near enough. It is only near enough for earth's gravity to put it in a circular motion around earth. Like when you attach a string to a stone and swing it round and round.

2006-08-05 22:11:38 · answer #11 · answered by ET 3 · 0 0

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