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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

Does gravity force a hellium balloon to rise?

No, not directly ... it needs gravity to be present, but gravity alone won't do it.

There's plenty of gravity on the moon, but a helium balloon won't rise there.

A helium balloon floats in air, for exactly the same reason that a block of wood

floats in water. Look up "Archimedes' Principle" and read about it.

What two factors do gravity depend on?

The forces that arise on account of gravity depend on the masses of

the objects being attracted toward each other, and on the distance

between their centers.

Why does a block of wood held underwater rise to the surface when released?

Because the weight of the wood is less than the weight of an equal volume of water.

So when it's completely submerged, the upward buoyant force on it is greater than

the downward gravitational force on it. The wood accelerates in the direction of the

net force on it, exactly as one wood expect.

Mass or weight.Which is dependent upon gravity?

Weight is dependent upon gravity, while mass is a measure of the amount of matter in an object and remains constant regardless of the gravitational force acting on it. Weight is the force of gravity acting on an object's mass, causing it to have a different value depending on the strength of the gravitational field.

How does an object affect its accelration during free fall?

Without propellers, jets, or a parachute, an object can't to anything to affect its

acceleration when it's falling.

"Free fall" means moving under the influence of gravity only, with not even any air

resistance. In that situation, on or near the surface of the Earth, acceleration is

constant, regardless of the size, shape, mass, weight, or gender of the falling object.

That number is 9.8 meters (32.2 feet) per second2 ... known as the acceleration of gravity

on Earth.

What is the name of mabels pig in gravity falls?

Mabel's pig in Gravity Falls is named Waddles. He is Mabel's beloved pet pig and often accompanies her on her adventures.

What happens to the acceleration of an object as it falls through air?

-- If you really mean "falls through the air", then its acceleration steadily decreases.

-- If you're actually thinking about an object that's "falling", with no air in the way and

no other influence on it except gravity, then its acceleration is constant as it falls.

Does gravity pull objects apart?

In order for that to happen, one object must be positive mass and the other one

must be negative mass. Negative mass has never been observed yet, so gravity

has never been observed to push objects apart.

What would be bettrr the gravitational force between two feathers or two bowling balls assuming the distance between them is equal?

The gravitational force between two bowling balls would be greater than the gravitational force between two feathers. This is because the force of gravity is directly proportional to the mass of the objects interacting. Since bowling balls have a much greater mass than feathers, they would exert a stronger gravitational force on each other.

Is acceleration due to gravity always downward?

Acceleration due to gravity is always directed towards the center of the Earth, which is typically considered downward. However, in certain situations such as on a curved surface or in space, the direction of gravity's acceleration may vary.

What is the magnitude of the force on an object in free fall near the earths surface?

-- The force of gravity near the surface of the Earth is close to 9.8 newtons (2.205 pounds)

per kilogram of mass.

-- "Free fall" means no other forces acting on the object besides gravity. If that's true,

then the object's acceleration is 9.8 meters per second2 downward.

-- In reality, it's very difficult to achieve real free fall because of air resistance.

The effect of air resistance is a force on the object that depends on its speed,

shape and size, and acts in the direction opposite to the object's motion.

Considering an object in fall, the force of air resistance acts opposite to the force of

gravity. So the combined magnitude of both forces is less than the force of gravity

alone. That means the object's acceleration is something less than the acceleration

of gravity. When it reaches the speed where the force of gravity and the force of air

resistance are equal, the combined magnitude of both forces is zero, the object stops

accelerating, and falls from there at a constant speed, called "terminal velocity".

How is magnetic force like gravity?

Both magnetic force and gravity act at a distance without direct contact between objects. They both follow an inverse square law, where the force decreases with distance squared. Additionally, they are both fundamental forces of nature that govern the motion of objects in the universe.

What factors affect the way gravity acts on objects?

The factors that affect the way gravity acts on objects include the mass of the objects and the distance between them. The larger the mass of an object, the stronger its gravitational pull. Similarly, the closer two objects are to each other, the stronger the gravitational attraction between them.

How are gravity weight and mass related?

Gravity is the cause of forces that attract every pair of masses toward each other.

If one of the masses is the Earth and the other one is you, then you call the force

your "weight".

When is acceration due to gravity is -9.81?

When you're on or near the surface of the Earth, and

you've decided to call the upward direction positive.

Where on earth can a hammer and feather drop at the same speed?

Inside a safe dropped from a plane.

If there were a very good vacuum to drop them in, it would be close. The air resistance of a feather limits its falling velocity more than the resistance on the hammer. When the drag caused by friction equals the weight of the object, it cannot continue to accelerate and falls at a speed called its terminal velocity.

Why do a stone fall faster than a paper?

Because the paper has to push more air out of its way while it's falling.

If you could drop them in some kind of a tube or tank with no air in it, then the stone,

the paper, a bowling ball, a drop of water, and a feather would all fall together.

When is acceleration due to gravity positive and when is it negative?

Acceleration due to gravity is negative when an object is moving up. Accl'n due to gravity is positive when an object is moving down (since gravity acts downwards on an object).

^Acceleration due to gravity is always negative, while the acceleration of the ball upward was positive due to what threw it, not gravity.

What is the maximum velocity of a man weighing 90kg if the man could fall forever?

-- Imagine that the only things in the universe are the man and the Earth,

so that there are no other bodies to pull him off of a straight course toward

the Earth.

-- Now imagine that he is infinitely far from Earth, you drop him from there, and

the Earth's gravity pulls him all the way down to Earth. At every step of the way,

he goes faster and faster, because there's a steady gravitational force on him that's

accelerating him, and also because the force keeps increasing as he gets closer to

the Earth. So even his acceleration is growing.

-- When he finally hits the Earth, with a small 'splat' like Wile E. Coyote, he's falling

at 11.2 kilometers per second (6.96 miles per second).

-- It makes no difference how much mass he has, or how much he weighs when he

gets here. If the man, his rotund mother-in-law, a small stone, and his car were all

'dropped' at the same instant from infinity, they would all splat at the same time and

at the same speed.

When is work said to be done against the force of gravity?

All bodies with mass are attracted to the Earth by gravity, so when a body is raised you must do work to raise it. This work is equal to force x height, if force is in Newtons and height in meters, the work is in units of Joules.

Where did gravity get its name?

Arriving in the English language around 1500 CE, the word derives from the Middle French word gravite, meaning seriousness, or thoughtfulness. It also derives from the Latin word gravitatem.The scientific sense of the word, meaning force that gives weight to objects, was first recorded in the 1640s.

What force other than gravity is pushing on a rock when it sinks?

The "buoyant" force is acting on it, in the vertically upward direction. That force is

equal to the weight of the water that would be in the volume of the rock if the rock

weren't there.

Which would you expect to increase the gravitational force between two objects?

If you want me to pick the correct answer from a list of multiple choices for you,

the least you could do would be to let me see the list.

In this case, I can make a pretty good guess, because there are only two things

that can have any influence on the gravitational force between two objects . . .

the masses of the objects, and the distance between them.

What is a quartz's specific gravity?

Specific gravity of quartz > 2.65; variable 2.59-2.63 in impure varieties.

Who does the rap on royal tailor gravity pulling heaven down?

The rap on Royal Tailor's song "Gravity (Pulling Heaven Down)" is performed by rapper Capital Kings. They collaborated on the song with Royal Tailor, bringing their unique hip-hop style to the track.