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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
How did newton discover universal law of gravitation?
The law of Gravitation from Newton was ;
'' Every matter in the universe attract each other by a line joining them with a force
which is directly proportional to the product of there masses and inversely proportional to the square of the distance between there centers.''
Pluto's gravity is about 7% that of Earth's. A person weighing 100 pounds on Earth,
would weigh a mere 7 pounds on Pluto.
The average gravitational acceleration at the surface is 0.58 meters per second2.
For comparison, the acceleration of gravity on Earth is 15.94 times greater.
What does the pull of gravity depend on?
The equation for the Gravitational force on an object is F=GMm/r^2
Where:
G is the gravitational constant
M is the mass of one object
m is the mass of the other
r is the radius between the centres of mass of the two objects
So therefore the 'pull' of gravity depends on the mass of the objects involved and how far apart they are.
What is acceleration due to gravity called?
Acceleration due to gravity means the force due to weight of an object which increases due to the gravitational pull of the earth.
What was the date that sir Isaac newton found gravity?
Sir Isaac Newton is said to have discovered the concept of gravity in 1665 or 1666, when he observed an apple falling from a tree. This observation eventually led to his development of the law of universal gravitation.
Mass itself doesn't actually change gravity (on a notable scale, unless their is a whole lot of mass, like a planet), but rather the amount of mass affects, how gravity will effect it. Technically, all objects have gravity, but most aren't noticeable. But, to answer the question mass does "change gravity" dramatically, for example if you have a human and a plant, obviously the plant has more mass, so the human is drawn to the plant, But, if you have to human next to each other their will be no noticeable gravitational pull, so clearly mass has a great effect on gravity.
Why does gravity not pull air down?
Gravity is mass pushing us down towards to planet based on Einsteins theory of relativity.
The large a planetary mass is the more space it takes up and in turn the space pushes you down.
Contrary to popular uneducated belief, gravity does not 'Pull' you down
How would life develop on planets with heavy gravity?
It would seem that all things organic would be shorter, stouter. Takes more energy to move around, and things fall faster, and the impact hurts more. It depends how heavy the gravity would be, Earth's is considered standard gravity, which means items fall and accelerate a set rate, on a heavy gravity planet, these numbers would be faster. I do not think that humans could live on a heavy gravity planet, unless it were just slightly higher than Earth's. Little things, like swallowing, moving our hands to scractch our necks, would be hard on this type of planet. Plants and other animals would likewise be affected.
there
^^^^Are you dumb? Organisms would adjust to the gravity forces and it would eventually feel normal to us. Humans would be alot stronger and faster, heavier objects would sink in the ground. That's about it.
Venus has a surface gravity of 8.87 m/sec2 or 0.904 g.
For comparison the Earth has a gravity of 9.780327 m/s² or 0.99732 g
So the gravity on Venus would be about 90.4% of Earth's. Although the planet has a smaller mass, it also has a slightly smaller diameter.
How does an anti-gravity machine work?
You don't. There is, so far as we have been able to determine, no such thing as antigravity.
What's more, it's not just a matter of "there might be, we just haven't discovered it yet." There are fundamental reasons to believe that there cannot be a negative gravitational "charge" the way there can be positive and negative electrical charges.
Anti-gravity is an idea of creating a place or object that is free from the force of gravity. It does not refer to the lack of weight under gravity experienced in free fall or orbit, or to balancing the force of gravity with some other force, such as electromagnetism or aerodynamic lift.
No, it doesn't have mass or take up space.
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No, gravity is a force.
Law of conservation of gravity?
1. An object in rest tends to stay in rest until it is acted on by an outside force e.g. gravity. Same applies to an object in motion
2. The acceleration of an object depends on the magnitude (amount) of force and the direction of the force. Basically, more force, more acceleration
3. For every action there is an equal and opposite reaction. When you sit on a chair you put a force on it. The chair must respond with the same magnitude of force or it will collapse.
Hope this helps!
FYI, its laws of motion, not gravity :)
If you weigh 50 pounds on earth how much do you weigh on mars?
Your weight on Mars would be approximately 19 pounds. This is because Mars has less gravity than Earth, about 38% of Earth's gravity. So if you weigh 50 pounds on Earth, you would weigh less on Mars due to the weaker gravity.
---Jump off a building and test this theory.
---The above suggestion is idiotic and close-minded. What would you suggest if you had to prove that there was oxygen in the atmosphere? To breathe through your nose/mouth to test this theory? Just because an object falls towards the Earth does not mean that it proves gravity. You can hold an experiment in outerspace, throw a tennis ball to what you perceive as 'downward' without the influence from any planets, solar systems, black holes, and even stars. Would you tell me then that the tennis ball is falling/floating towards something because of gravity? If you tell me that it's due to force, jumping off of a building also projects force. Sure, you may be looking at some traits of gravity, but it doesn't mean it absolutely exists if the same conditions were met in a different environment. Ultimately, scientists are still baffled at how gravity works. Mathematicians and physicists have created formulas that projects the behavior of gravity, but still have been reluctant to produce any physical evidence that gravity exists. It has ONLY been proven that things are AFFECTED by "this" in which we call "gravity." The problem with science is that it relies ONLY on physical evidence. Sure there are many things that cannot be explained and through many experiments they've come to conclude such things as laws while other subjects are merely labeled as impossible and "crazy," such that as the paranormal. That's why it's called the Law of Gravity due to some known traits and not the Theory of Gravity. I hate it when people suggest the obvious, of course you'll fall off the building and hit the floor, thus experiencing gravity. Did you also know that if you dive into the ocean without an oxygen tank that you can drown because you're experiencing the breathing in of water instead of oxygen? Stop it with the "I-Know-It-All" egocentric attitude. This person asked an honest question, and you needn't answer it with a condescending remark like "Jump into the flames to prove the theory of fire." As a conclusion, gravity has NOT been proven, in terms of science wanting to find PHYSICAL evidence of existence before it becomes "real." So in a sense, you can say "In the name of science, gravity is fake because it has no physical existence." When it comes to reincarnation, the scientists will wait for a day to see the elderly and the deceased from the Roman Empire to WWII run to pregnant women, enter her through the naval and manifest themselves in their new lives. What kind of common sense is that? There are some things that cannot be seen, cannot be proven (to an extent) and yet we understand that it is there.
--The above answer immediately labeled the first as idiotic and closed-minded. I'll label my precursor's answer as bloated and hostile. As far as I know it hasn't been proven in whatever "proper" way someone considers something proven, but I believe it has much more merit than the paranormal, reincarnation, or "God" for that matter. I also believe that we prove it on a daily basis. For me it is proven, and I say that in the same manner as when someone claims that God exists and that it is proven... if I must.
Why doesn't gravity work in water?
Gravity does work in water; it is the force that pulls objects downward toward the center of the Earth. However, objects in water may appear to float or move differently due to buoyancy, which is the upward force exerted by a fluid that opposes the weight of an object immersed in it.
How is a soap bubble affected by gravity?
Gravity acts downward on a soap bubble, causing it to fall to the ground. However, the surface tension of the bubble helps it retain its shape and keep its buoyancy, allowing it to float in the air for a period of time before eventually popping or collapsing under the pull of gravity.
How does a parachute reduce the effect of gravity?
A parachute reduces speed from the air moving up hitting the canvas and having nowhere to go but to the left and right, its like a cushion.
You imagine a car going along at 100km/h and then hitting a wall, that is pushing one force against another, something has to give or slow down. If the car is going fast enough the wall will break but the vehicle will most likely be crumpled beyond repair.
Therefore a parachute is pitting one amiable force against another amiable force therefore slowing a persons (or whatever else) descent.
What is the relation between API gravity and specific gravity?
API gravity is inversally proportional to the specific gravity. so if the value of spcific gravity for some material is higher , it means that the API gravity of the same material will be lower.
When objects are moved further apart from each other the force of gravity does what?
In classical physics, the force of gravity between two objects is given by the following equation:
F = G(Mm/(r^2))
Where F is the force, G is a number called the Universal Gravitational Constant, M and m are the masses of the two objects, respectively, and r is the distance between them.
From this equation we see that F, the force is proportional to 1/(r^2). This is known as the inverse squares law. When objects are moved apart, the radius r increases and so the force of gravity decreases in accordance with the inverse square proportionality.
Is gravity dependent on density?
No, gravity is not dependent on density. Gravity is a fundamental force that depends on the mass of an object and the distance between objects, as described by Newton's law of universal gravitation. Density can affect how objects interact with gravity, but it is not a direct influence on the gravitational force itself.
inertia is the laziness of an object, or an objects resistance to change its state of motion, or how easy it is to start or stop an object. Mass is the measure of an object's inertia. Therefore with more mass, an object has more inertia.
Since gravity has a theoretically infinite reach, its influence is felt, even minimally, everywhere. Microgravity occurs in such places, where there is not quite enough force created to give any noticeable influence; this can be anywhere from one hundred to one billion kilometres away from the nearest object.
The force of gravity is pretty much everywhere: if a mass is attracted to another mass, that is probably gravity.
The source of gravity is mass, if you mean that. It's only really apparent from large masses such as planets, moons or stars. Since most of these are round (and rotationally symmetric), for calculation purposes you can consider the source of gravity to be at their center.
Sir Isaac Newton is credited with discovering the concept of gravity in the late 17th century. He formulated the law of universal gravitation, which states that every object in the universe attracts every other object with a force proportional to their masses and inversely proportional to the square of the distance between them.
