Gravity

Ten times Earth's gravity would produce a gravitational force equivalent to 100g (100 times the acceleration due to gravity on Earth). This extreme force would exert immense pressure on the body and could be potentially lethal.

The force of gravity on the second apple would be 2N, as gravity exerts a force that is directly proportional to the mass of the object and the distance from the center of the Earth. Since the second tree is twice as tall as the first one, the force of gravity acting on the apple at the top of the second tree would be doubled.

If the force of gravity of Earth were to drop to zero, to put it in simple terms:

Firstly, the whole atmosphere would leave Earth. Meaning all living things would most probably die as many of us can't live without air.

Secondly, the moon would most probably float off to space. Without Earth's gravity, it is highly possibly we would never see the moon again. Either that, or the moon's gravity on its own could hold and it would merely be further away from Earth than usual.

Thirdly, those not clutching onto something would definitely float off to space as well. People who wants to be lighter would be happier however, as without gravity, everyone's weight is reduced to zero kg, zero grams, zero pounds, etc.

By definition a massless particle has no rest mass therefore it can not take up any spacial volume. I think the confusion lies with calling something that is massless, a particle. This is because as soon as we hear particle we think "object" and objects have definite mass and volume. A photon is massless and sometimes people may refer to it as a particle of light. But in fact that is sort of a misnomer being that it really isn't a particle, though it has particle-like properties. If something is massless theorists have said that the object does not interact with the Higgs field, though gravitational effects are still felt by the photon, example: gravitational lensing.

You can replicate the effects of increased gravity through speed. If you are in a moving vehicle which suddenly stops, you will get thrown forward, which is partially due to increased gravitational force or g-force. If you are on a fast-moving ride at a funfair, you experience increased gravity.

The diameter of the Moon is about 1/4 (one fourth) the diameter of the Earth (more precisely 27.2%).

Moon diameter = 3476 km (equator) 3472 km (polar)

Earth's diameter = 12756 km (equator), 12742 km (polar)

Jupiter, the biggest planet, exerts the strongest gravity.

The surface gravity on Mars is about the lowest in the solar system, roughly the same as Mercury at about four-tenths that of Earth. While it would not immediately be harmful, over a period of time a person living in lower gravity would experience some decrease in bone density, from demineralization - an effect similar to osteoporosis, which would contribute to chances of bone breakage and increased healing time. This effect would be reversible upon return to Earth gravity. There would also be a loss of muscle mass and strength, and possibly undesirable cardiovascular effects in the long term. There may also be undesirable long term effects related to balance, vision, blood volume, kidney function, and others.

Uranium is a heavy metal (a metal with a specific gravity of 5.0 or greater) with a very high density (18.95 g/cm3 , 1.7 times higher than lead's density of 11.35 g/cm3)

It's 9.8 newtons per kilogram.

Y'all come see us.

Don't be strangers now, y'hear!

The teacher's manual answer is that mass warps space. But the real answer is "Just Because" it's what mass does. == It's interesting in this day and age when we're on the threshold of discovering the very basic nature of the universe by virtue of our understanding of matter and spacetime that we don't know more about gravity. For as long as I can remember, the best answer for the question "what is gravity?" is this one: We don't really know. It's still true. Accept it. Say it with me: we don't really know. See? It didn't stop working just because we made that admission. We know what gravity does. There is a wonderful history associated with its quantification. We can sure measure its effects, can't we? Those elegant sets of calculations for, say, the music of the spheres, are nothing short of breathtaking. But what is it that is accessible to the rest of us that lets us get a handle on gravity? There really isn't too much. Let's review. Matter has mass and occupies space. By virtue of just existing, matter warps spacetime. It puts a dent in it. But that doesn't provide too much extra help. Spacetime is (hold on to your seat) a mathematical construct. Darn it! That ain't any help! Perhaps an experiment would help. Try something that's been passed along to teachers here and there. The necessary equipment list includes a bed sheet and two modestly heavy balls like croquet balls. Lighter balls like tennis balls won't work as well, but a bit of creative thinking and experimenting will allow one to make a good substitute for the wooden spheres. Four students hold a bed sheet by the corners and stretch it out. Hold it steady! Put a ball in near the middle. See the dent? That's what mass (the ball) does to spacetiime (the sheet). This is a two-dimensional model, but it is really quite good. Now add the second ball near the first one. (A bit of practice might be required because there are limits on what the bed sheet will allow. Try short sheeting the setup from one or from two adjacent sides.) The second ball makes a dent like the first one, but the space between them is deformed, and the balls will roll together. If they are placed too far apart, the demonstration breaks down, but that's where the practice comes in. Lastly, it's absolutely wonderful and exciting that we don't know more about gravity! We know all this other stuff. All this other science and technological stuff. And yet here is gravity! It is so big, so broad in its effect, that it is the large scale organizer of the whole universe itself! We have spent our entire lives in it, and we react to it without thinking when we move. And yet it stands in defiance of our understanding! Hey! Anybody wanna Nobel prize? Wanna become world famous? Wanna have hotties asking you for your phone number? We have this little problem that needs solving....

When the moon is full, the earth expierences a spring tide. A spring tide includes High high tides and low, low tides. This is due to the gravitational pull of the sun is cooperating with the moons gravitational pull therefore creating high tides on opposite ends of the earth and the same for the lows.

acceleration together a = (G*(m1+m2))/r^2 balanced by:

acceleration apart a = v^2/r

G = 6.67*10^-11 (m^3-kg^-1-s^-2)

m1 = mass 1 (say sun = 1.9891*10^30kg)

m2 = mass 2(say earth+moon= 6.048*10^24kg)

r= distance between cog's (metres)

v= orbital velocity (metres/sec)

gravity/distance/orbital velocity are all complimentary

Velocity is relative to the observer and or objects that are in the area , if your sitting in true zero gravity from your point of view you will be standing still but in-reality your velocity will based on your original thrust. Some one watching you (at a zero velocity) from another location might see you zoom by at the original velocity. So the new question is if that other person has zero velocity and is in zero gravity what time will it be when they look at their watch ? Hmmm

Without gravity, objects would not be pulled towards the Earth, so there would be no tides, no atmosphere, and no orbits of celestial bodies. Anything not directly tethered or attached to a surface would float off into space.

A planetoid about the size of Mars crashed into the early Earth likely pulled out a a Lagrange point by Jupiter's gravity. Then pulled into the Earth by both bodies gravity, in an off-center hit sending debris into space and leaving a small portion in space with the added Earth debris that was pulled together by gravity again into the moon. As it drags along its slow orbit it's slowly being pulled away at about an inch a year because the gravity of Earth isn't supporting it so well (for reasons I won't go into here.) Gravity can only be significantly felt between objects with a very large mass, like the Earth and Moon. Which is why you dont feel a gravitational attraction between you and your computer.

The Moon formed when gravity pulled pieces of rock and debris together into one big rock.

To escape the gravitation pull of an object you must travel at or in excess of the escape velocity. The direction of the escape velocity is always radially outward from the center of the object.

The law of gravity says the force experienced is proportional to the product of the two masses and inversely proportional to the square of the distance between them.

Effectively on earth the measurement of the force of gravity on a mass is the weight of the mass.

As an Elephant has more mass than a Cat, it weighs more than the Cat (because the mass of the Earth is constant).

A black hole exerts such a strong gravitational pull that not even electromagnetic radiation, including visible light, can escape its grasp. The intense gravitational force of a black hole warps spacetime to create a region from which nothing, not even light, can escape.

Gravity and magnetism are separate fundamental forces with different properties. Gravity is a force of attraction between objects with mass, while magnetism is a force that acts on objects with magnetic properties. The two forces have different mechanisms and cannot be directly interchanged or equated.

That happens relatively close to Earth, because the Sun has a much stronger gravitational field than Earth.

It's inside the Earth's orbit about 260,000 kilometers from Earth, in the direction of the Sun.

There's a similar place about the same distance from Earth, but outside the Earth's orbit.

The Earth is constantly moving relative to the Sun, so there is no fixed place in space where this happens.

Notice that these places are not the "Lagrangian points". They are a related, but different thing.

I've a feeling this question may indeed be about the Lagrangian points.

In that case the answer is: "at one of the 5 Lagrangian points".

However, the forces balance there only if you include the "centripetal force"

required to keep a small object, at one of these points, in a stable orbit.

In order for a body to escape the gravitational pull of the Earth, it needs to be thrown up with an initial velocity equal to or greater than the escape velocity of around 11.2 km/s. This velocity allows the object to overcome the gravitational pull of the Earth and continue traveling away from it indefinitely.