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Gravity
One of the four fundamental interactions, gravity is responsible for the fact that any objects with mass attract one another. According to general relativity, it is a space time curvature, but according to quantum mechanics it is the result of exchanges of virtual gravitons.
4,784 Questions
What level is the current gravity on earth?
The acceleration of gravity at the surface of the Earth is 9.81 meters per second2 .
That means that the downward force on any object at the surface is 9.81 newtons
per kilogram of mass.
What is the value of acceleration due to gravity in space?
The magnitude of acceleration due to gravity depends on the mass of the object
toward which you're attracted by gravity, and on your distance from it. There are
trillions of different possibilities in space.
How do things move in space if there is no gravity?
The question has two small problems:
#1). There's plenty of gravity in space.
#2). Gravity is not necessary for something to move.
Other than that, it's a fine question.
What are the notes to the gravity falls theme song on alto saxophone?
just figure them out. It's easy if you go off the Bflat scale. just start at g, i think
What is the gravity on veanus?
Approximately 8.87 meter/second2. For comparison, Earth's gravity is approximately 9.82 meters/second2.
Does mass change on other planets due to gravity?
No. Except for insignificant effects related to Special Relativity, the mass remains constant. The weight, on the other hand, changes. Weight is calcualted as:
weight = mass x gravity
Where "gravity" is the acceleration due to gravity.
How does Saturn's gravity affect humans?
Gravitational attraction toward Saturn has no effect on humans at all. It never will, unless and until some human travels to Saturn in a spacecraft.
How is a rocket able to escape earth's gravity?
It can never escape it entirely. It can, however, travel fast enough that the increasing distance outweighs the effect of the decreasing gravity. On earth, this velocity is about seven miles per second.
What is the Moon's gravity 6 times on Earth's surface?
The Earth's mass is 81 times the mass of the Moon, so the force of gravity at any given distance is 81 times more. Earth's gravity at the surface is six times more than the Moon's gravity on the surface; that means that the following things are six times greater on Earth:
* Gravitational acceleration - if you let an object fall, how fast does its velocity change. On Earth, acceleration due to gravity is about 9.82 meters/second2, on the Moon, it is about 1.62 meters/second2.
* The weight of any given object. On Earth, a kilogram has a weight of about 9.82 newton; on the Moon, it is about 1.62 newton.
What is the gravity pull of the earth on a asteroid?
Most asteroids are located in the asteroid belt, which is so far away from the Earth
that they do not experience any measurable gravitational pull from Earth. If an
asteroid approaches the Earth, however, then it will experience quite a substantial
gravitational pull. Asteroids can weigh thousands or even millions of tons.
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Answer #2:
There can never be any single answer to that question. Just like any other
object, of course, the gravitational force between the Earth and an asteroid
depends on the mass of the asteroid, and on how far it happens to be from
Earth at the moment.
Here is a sample, 'back-of-the-bar-napkin' calculation:
-- Assume that the asteroid has a mass that would weigh 1 million tons on Earth.
-- Assume that the asteroid is only 10,000 miles outside the orbit of Mars.
So, as the Earth and the asteroid both go round and round the sun in their
respective paths, the closest they can ever get to one another is about
33.9 million miles.
-- When the asteroid is on the surface of the Earth ... 3,959 miles from the center ...
it weighs 1 million tons. Its weight when it's 33.9 million miles away is just 1 million tons
times the square of the inverse ratio of those distances.
(1 million tons) x ( 3,959/33.9 million)2 = 18.35 tons
That's the Earth's pull on the asteroid, and the asteroid's pull on the Earth,
when they're as close together as they can ever be.
Mars, being so much closer, and Jupiter, being so much more massive than the
Earth, have that much greater gravitational interaction with the asteroid, and
potentially big effects on the shape of its orbit. The problem with that is that
they may nudge the asteroid into an orbit with a shape that could eventually
coincide with where the Earth is that day, and could wipe out the remaining
dinosaurs.
Does an apple attract the earth towards it?
F = G(m1m2/r2)
As you see both masses attract one another and are actually in acceleration
towards one another, but the mass of the earth is so much more than the apple
that the acceleration of the earth towards the apple is quite negligible.
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Addendum:
The acceleration of the Earth toward the apple may be quite negligible, but the force is not.
The important thing to be aware of ... which the question asks and the first answer skips by ...
is that there are forces of attraction in both directions, and the forces are equal.
The Earth is attracted to the apple with exactly the same amount of force as the one
that attracts the apple toward the Earth. Another way to say this is: Whatever your
weight is on Earth, the Earth has exactly that same weight on you.
Added:
The above is not quite correct as the force is almost all due to the mass of the earth and one can assume the radius is just approximately the radius from the center of the earth to the apple on the surface, or there about. The question does not need an equal and opposite attraction answer as the implication of gravitational acceleration is obvious. The apple is not pressing down on the earth, nor is the converse implied.
What planet has stronger or weaker gravity than earth?
All of them do. There's no planet where
the gravity is the same as on Earth.
What would happen if the force of earth's gravity suddenly stop pulling in the moon?
In that case, the Moon would move in a straight line instead of moving around the Earth; it would quickly get away.
Why do you not notice Jupiter's pull of gravity?
Because you are so far away from Jupiter, and so much closer to the Earth.
