Why is gravitational force called weakest form of energy ?
140789
Gravity is the weakest of the four fundamental forces.  If you take the smallest amounts of the quantities that each force depends on (mass for gravity, charge for electromagnetic, etc.) and put them the same distance apart, then gravity is by far the weakest force.   But you have to use a very small distance, because the strong and weak forces are only short-range forces; they don't extend out much beyond the radius of a nucleus.  Consider the interaction between two quarks that are 3 x 10^-17 m apart.  Their strong nuclear interaction is about 100 times stronger than their electomagnetic interaction, about 1,000,000 times stronger than the weak interaction, and about 10^43 times stronger than the gravitational interaction.
205616
The Begy atomic model. It eliminates the nedd for the quite unbelievable strong and weak nuclear forces. It also defines gravity as a force acting upon the universe rather than from within it. This reduces the forces in this universe to just one the electromagnetic force. Is this a unified field theory?\n\nWeb search, "Begy atomic model"
598564
There are fundamentally many ways to answer this question; and I will address three.\n\nIn nuclear chemistry, there are four fundamental interactions of matter that can be termed energy:\n\n1. Strong interaction, or strong force. This is the force which holds together quarks and other subnuclear particles into discreet protons, neutrons, and electrons. This is the energy that is released in a nuclear reaction.\n\n2. Weak interaction, or weak force. This is the force which holds protons and neutrons together in the nucleus of an atom. This is the energy that is released in radioactive decay.\n\n3. Electromagnetism. This is the attractive or repulsive force caused by the positive or negative charge of atomic particles and the electromagnetic field of photons. This force is the most wide in function, and is present in practically every conventional phenomenon. The electromagnetic force is responsible for electron orbitals, for chemical bonds and reactions, for electromagnetic radiation, and fundamentally for traditional force.\n\n4. Gravity. This is the tendency of objects with mass to accelerate toward each other. This is the weakest force, but can act over an almost unlimited distance.\n\nOR ....\n\nIn classic chemistry, a molecule can have three kinds of energy:\n\n1. Transitional energy, or the energy relative to motion.\n\n2. Chemical energy, or the energy inherent to electrochemical bonds.\n\n3. Vibrational energy, or energy relative to the vibration or oscillation of individual molecules.\n\nOR ...\n\nIn physics, we categorize all energy in the universe into two sets:\n\n1. Potential energy. This is the energy inherent in position or interaction with another body.\n\n2. Kinetic energy. This is the energy a mass possesses relative to its motion, whether it be classic velocity or vibration. This is sometimes termed work, though this is technically incorrect; both kinetic and potential energy are work, in different forms.\n\nAnd there you have it.
208985
The force of gravity has to do with an attraction of objects due to mass. The nuclear force has to do with attraction or repulsion of nucleous at very small distances. Electric Force is attraction or repulsion due to the charge of the object, and is very important in the actual structure of an atom. Inertia has to do with the continued movement of an object (an object in motion continues to move unless another force acts upon that object.)\n\nYou might think that gravity is a strong force, because you see it's effects all the time - however, the strongest forces will either be the nuclear force or electric force. If gravity is stronger than electric force, then you get black holes.
961109
It's good to see people actually thinking about what the terms they're using mean, rather than just plugging them into equations.\n\nBasically, the place where you seem to be confused is here:\n\n"In gas such as water vapour, intermolecular forces of attraction is weak and hence it has low PE"\n\nActually, this means the exact opposite, that the system has very high potential energy. Think about gravity for a minute - if a rock placed at, say, 1 foot above the ground were to fall to Earth, it would not release very much energy. Conversely, if the rock were placed 1 mile above the Earth, it would release a considerable amount of energy. The higher the rock is, the greater it's potential energy. However, the further the rock is away from Earth, the weaker the force of gravity acting on it - thus weak gravitational attraction corresponds to higher potential energy. Similarly with the particles in a gas - if they were to "fall" into a partially bound state such as that of a liquid, they would release energy, and thus the unbound state where the particles are too far away from each other to form bonds is the higher energy state.\n\nThis is not to say that a weaker force always corresponds to a higher energy state - if the reason that the force is weaker is that there is less mass/charge/whatever producing it, that really will lower the potential energy. But in the transition from a liquid to a gas does not change the charge of any of the particles - the reduction in intermolecular forces comes from the fact that the particles are moving out of each other's electrical potential wells, a process which, just like lifting up a rock, raises the potential energy.
1058239
Yeah, force is just energy applied on a particle. Force per time is power.
987930
No energy source? What source of energy is needed? And the simple presence of mass causes gravitons. And these gravitons interact with one another. And proof, you need proof that gravity works? Dude go jump off of a building and see what happens!
1153313
gravity, strong force, weak force, and electromagnetivity
158544
hmm....by power I'm pretty sure you are just asking what causes the "attractive force" of gravity? .... the short answer is that matter itself (objects with mass) impose a curvature on the surrounding spacetime which we feel as the attractive force of gravity. \n\nThe more complicated answer is that a quantam theory of gravity would have to be eventually discovered as to make gravity consistent with the other three forces now explained by quantum mechanics..(electromagnetic, weak, strong). Each one of these forces is mediated by an associated particle (electromagnetic- photon, weak-w boson, strong- gluon). The problem is that at the current time no one has ever found the theorized graviton which would be the force mediator for gravity. It has also been speculated that the idea of "mass" is itself mediated by a particle known as the Higgs Boson. This particle along with the graviton would go a long way to explain the most familiar force in our daily lives... but the most mysterious as far as science is concerned.
223530
How about the adding of Gravitational Potential Energy (GPE) and Kinetic Energy (KE) as an object falls in the air to demonstrate the preservation of energy?\n\nBefore it falls all energy is GPE, as it falls GPE is converted to KE until just before it hits the floor then it is all KE.
533693
Gravity is a very weak force.  Think of a fridge magnet.  A small magnet, or large for that matter, will stick to a fridge despite the gravity from the entire earth pulling it down.
261295
the force of gravity is one of the weakest (you can just see it's effects in a macroscale) that's because G is such a a small value... this Cavendish guy used a torsion balance to measure G ( a rod with two metal spheres at their ends).\n \nwhen you twisted the rod, then a torsional force is exert (..that force is proportional to the angle of rotation of the rod) ; He relate the angle of rotation and the quantity of torsional force ..then, he brought 2 lead spheres near the smaller ones (attached to the rod) ..because the force of gravity the larger spheres attract the smaller ones , twisting the rod ..then he measured how much..he knew F, and the masses of the metal spheres , then by Newton's formula F=Mm/d^2 ( he knew d ..the rod lenght) he determined G...the first experimental measure of G (maybe he didn't have a life :).\nI've found also this page that may help you, good luck
231563
gravitational potential energy increases with altitued and the stregth of gravity\n\n\n\nwhile work is done, potential energy is converted into kinetic
42159
I'd love to know what your answer is. Its actually something physics seems very confused about.\n\nAccording to GR, its masses that cause the curvature of space. Gravity isn't a force, its just masses following the path of least resistence - straight lines in curved space time.\n\nThe problem is they then try to introduce gravitons to carry what isn't really a force. Very confusing.\n\nIf we assume Einstein is right, that gravity isn't a force, but masses following curves, the real question becomes - where does mass come from?\n\nMy guess - quantum entanglement create at time zero that keeps everything in the universe interacting. I don't like the higgs bogusons theory, since that introduces yet another force carries in the terms of a, erm, massive particle that gets mass from, erm, itself...
879076
According to Newtonian gravity, gravitational force is -GMm/r^2.  Any mass experiences a gravitational force toward every other mass in the universe, proportional to the product of their masses, and inversely proportional to the square of their distance.  This means my body experiences a certain gravitational force from the sun, no matter what else is happening in the universe.  That says it would be impossible to shield me from the sun's gravity.\n\nTo find the net gravitational force on me, simply do a vector sum of all the gravitational forces on me from all other masses in the universe.  Simple to say, not so simple to do.\n\nThat sum is zero at the center of mass of the universe, wherever that is.  Unless the expansion of the universe is perfectly uniform, that point will shift with time.  I could find other points where the sum is zero.  I move away from that center of mass but toward a large nearby mass, just close enough that the pull of that nearby mass exactly balances the pull of the rest of the universe.  These will be single points, not regions.  At these points, I still can't say there's no gravitational force acting on me.  But I can say there are countless gravitational forces acting on me, but their sum is zero.\n\nLet's say I tell you I found such a zero-sum spot, about 1/3 of the way between our sun and Alpha Centauri, and I take you there.  How will you know I am telling you the truth?  The principle of equivalence says that there's no test you could make to tell whether the net gravitational force there is zero, or whether you are just accelerating according to the effect of the nonzero net force on your mass.\n\nThe relativistic warping of spacetime in the presence of gravitational mass is more a way of representing or measuring that force, rather than explaining it.  Neither Newton nor Einstein could tell us why gravity exists or how it works.  If spacetime is not warped in your region, it doesn't mean the gravitational field is zero, it means it is uniform.  And again, how would you tell whether spacetime is warped in your region?\n\nI've tried for decades to think of a gravity shield or a gravity insulator.  If I do find one, watch for my Nobel Prize in physics, and for me to quickly surpass Bill Gates on the wealth scale.
845910
I think nobody....because the gravitatory force is very weak.\n\nThe nuclear and strong forces hold together particles
632340
According to the Noether Theoerm each symmetry of a system gives you a conserved quantity. If you can move your system to other places and everything keeps the same, it's called invariant against translation. The conserved quantity in this case is the momentum. If your system is rotational invariant the angular momentum is conserved.\n\nThe symmetry that belongs to the conservation of energy is the time. So if it doesn't matter if you do your measurements today, yesterday or tomorrow, the energy in that system is conserved.\n\nEnergy is transfered from one form to another by the interactions, we currently know 4 basic forces: gravity, electromagnetism and the weak and the strong interaction. We have a theory that unifies electromagnetsm with the weak interaction, but we currently do not know how to join all four interactions to a Grand Unified Theory (GUT), especially gravity and quantum mechanics refuse very much to work together. But a GUT would give the final answer to your question, how energy can change from one form to another.