Gravity

Gravity is best expressed as a fundamental force of attraction between objects with mass. It is described by the law of universal gravitation, which states that the force of gravity is proportional to the product of the masses of the objects and inversely proportional to the square of the distance between them.

According to Einstein's theory of relativity the speed of gravity is equal to the speed of light; i.e. about 671 million miles per hour.

Note that this is still true in models for quantum gravity; there gravity is mediated by a massless particle and all massless particles have to travel at the speed of light.

The ratio of Force of Gravity to Mass represents the acceleration due to gravity, denoted as g. This value is approximately constant at 9.81 m/s^2 near the surface of the Earth, though it can vary slightly depending on factors such as altitude and geographic location.

There are basically two schools of thought about gravity, one I shall call the curvature or Einstein model, and the other one I shall call the particle model.

The Einstein model asserts that gravity is a curvature of spacetime and is the one predominately thought in schools, mainly because the particle model is more difficult to explain.

The particle model on the other hand asserts that, just like the other forces of nature, the force of gravity is transmitted via a virtual spin-2 particle called the graviton. The particle model also says that the graviton affects, or couples to, each other particle including other gravitons.

The predictions these models make are the same, because gravitons couple to everything, and to themselves, they can certainly give the same appearance as a theory of bent spacetime because there is no way to distinguish it (because there is nothing that does not couple to the graviton, and thus gravity) from a model with a rigid spacetime but with graviton self-interaction.

In fact using the framework of quantum field theory, one can show that one arises at exactly the same equations using the particle model as when using the curvature model.

The curvature model is older, being the model Einstein used himself, but the particle model seems to put gravity on equal footing as the other three fundamental forces (electromagnetism, weak and strong forces) which is also very pleasing. The particle model, however, has not yet been successfully been merged with the other three forces due to internal inconsistencies.

We have not yet seen a graviton in a particle collider because gravity is extremely weak compared to the other forces (consider a simple magnet able to lift up a piece of iron even with the entire gravity of the Earth pulling on it!) so a graviton would only couple very weakly so it would be very hard to detect. In fact I can probably not overstate how hard it would be.

A graviton couples so weakly that its influence would only become important in particle interactions at very high energies, and it is likely that at that point new physics will also emerge, such as the possible discreteness of space and time for example.

Distance is a scalar quantity that represents the total length traveled by an object, while velocity is a vector quantity that represents the rate of change of an object's position with respect to time. Velocity includes both speed (magnitude of velocity) and direction, while distance only considers the total path length traveled without specifying direction.

What is "a one hundred pound object" ? That's a peculiar label to put on anything,

since we know that the same object has different weights in different places ...

you know that too, or you wouldn't be asking the question.

I can only assume that you're calling it a "one hundred pound object" because

it weighs 100 pounds when it's on the surface of the Earth.

If that's true, then it becomes a "106.5 pound object" on Saturn.

The force of gravity is greatest between two masses whose product is greatest,

and which are closest together.

You're already as close to the earth's total mass as you can get, and there's nothing

you can do to change the earth's mass. So the only way to increase the mutual force of

gravity between the earth and another body is to increase the mass of the secondary body.

In fewer words: Eat more. Get heavier.

yes it does. u can calculate the final velocity of the falling object with the following eqn: initial potential energy= final kinetic energy

or

mgh = 1/2mv2

where m=mass, h = height,v=final velocity

Yes, Coulomb's law is an example of a conservative force. A conservative force is one in which the energy required to move a particle (subject to this force) from one point in space to another is independent of the path taken.

On the earths surface gravity pulls you down.

specific gravity = relative density (relative to water @ 1 g / cubic centimetre)

specific gravity of gold is 19.3, so is 19.3 times the density of water.

so gold is 19.3 g / cubic centimetre

volume of 6k (6 000 g) of gold is : 6 000 / 19.3 = 310.9 cubic centimetres (.3109 litres)

Yes, gravitation refers to the force of attraction that exists between all objects with mass. Gravity specifically refers to the force of attraction that Earth exerts on objects near its surface. Gravity is one of the manifestations of gravitation.

Gravity affects a moving bike by pulling it down towards the ground, influencing its stability and speed as it travels on a sloped surface. Gravity also affects the bike's ability to climb inclines or descend declines, requiring additional effort or control from the rider to maintain balance.

The beaker and its contents may lose mass due to evaporation or chemical reactions taking place, resulting in the release of gases. Additionally, if the beaker was not properly sealed, some of the contents may have escaped into the surrounding environment.

if it was a continuous velocity then 10mps i guess because that is the terminal velocity when an object is dropped

this is another person who answer actuallyn you are wrong terminal velocity is the maximum

Accelerator!?

The football spins while being kicked in order to stabilize its flight path and maintain accuracy. This spin, known as the Magnus effect, creates lift and reduces drag, allowing the football to travel in a more predictable trajectory.

The specific gravity of steam condensate is typically very close to 1.00, which means it is very close to the density of pure water at the same temperature. This is because steam condensate is essentially just water that has cooled and condensed from its gaseous form.

Step one: Close your eyes real tight.

Step two: Take a deep breath.

Step three: Empty your mind of all rational thought.

Step four: Imagine real hard that the laws of physics do not apply to your reality.

Voila you now have made an anti-gravity lifter.

Gravity always acts as a pair of forces, not as one single force. The strength of

the forces depends on both masses, not just one of them.

The forces of gravity attract the diver toward the earth and the earth toward the

diver. The forces are equal in both directions. If the diver weighs 150 pounds on

earth, then the earth weighs 150 pounds on the diver.

The diver accelerates toward the center of the earth with an acceleration equal

to (weight)/(diver's mass), and the earth accelerates toward the diver with an

acceleration equal to (weight)/(earth's mass).

Has that helped, or just confused the issue further ?

kinda yes.. because friction is a resistive force acting against a body, so it will effect the motion and certainly slow it down

A clay ball sinks in water because it is denser than water, causing it to displace water equal to its weight. The ball's density is higher than the density of water, resulting in a downward force greater than the buoyant force pushing it up. This imbalance causes the clay ball to sink to the bottom of the water.