what is strong force and what is weak force?
541926
if I hit you with my right,that is strong force,with my left it would be weak force
1145043
Gravity certainly is the weakest force, and your reasoning was pretty good - as a very rough comparison of the strength of the gravitational force compared to the electromagnetic force, your magnet situation is quite neat...\nThe gravity exerted by a body varies with it's mass, and your lump of metal, a paper clip say, stays on the desk because of the gravity exerted by the Earth. Quite a weak magnet could easily move or pick up the paper clip, effectively overcoming the gravitational field of the whole planet!\n\nIn fact the Electromagnetic force is about 10^36 times stronger than the the gravitational force.\n\nWeaker still is 'The Weak Nuclear Force', which is felt over only a very, very short range and is involved in the action of radioactive decay.\n\nThere's one more force in our universe, and it's even stronger than Electromagnetism - the very imaginatively named 'Strong Nuclear Force'. It's many times stronger than the other forces and again works over an extremely short scale. It's what holds everything together on a subatomic scale, so has to be pretty tough or we'd all fall apart!
356020
I would say the strong nuclear force, that holds quarks together in protons and neutrons. This is the strongest if you add up all the individual forces in the universe, as it is present in every proton and neutron in every atom in the universe. If the strong force disappeared, the entire universe would instantly explode into fundamental particles.\n\nOn the other hand, on an everyday scale, the electromagnetic force is most noticeable (it is responsible for everyday forces between objects), and is stronger than gravity (by standing up the electromagnetic forces between atoms of your feet and the floor are overcoming the gravity of an entire planet.)
83668
There are several definitions of the word "force," but since your question is in the Other Science section, this should be the one you're looking for ---\n\nForce is a vector quantity; its size is measured in Newtons. One Newton will make a body of mass 1kg accelerate from rest to 1 metre per second, in a time of one second.
263427
gravitation, electromagnetic force, nuclear force
171241
The previous answer explained very well why it is important that the strong and weak forces are stronger than the electromagnetic force.  I will address *why* it's a good thing that gravity is weaker than the electromagnetic force, which also extends to an infinite distance.  That is because, while the electromagnetic force is sometimes attractive, sometimes repulsive, depending on the charges involved, gravity is always attractive.  Thus, while the electromagnetic force between any two fundamental charged particles is comparatively strong, overall, electromagnetism is weak, because the attractive and repulsive forces balance out.  Another way of saying the same thing is to note that overall, most macroscopic objects are electrically neutral, they have an equal number of positive and negative charges.  Even highly "charged" objects have overall only a tiny percentage more of positive charges than negative charges, or vice versa.  If gravity were as strong as E.M., then the universe would quickly collapse (or more properly, never would have formed) as all the particles in it would be too tightly bound together.
755944
Net force is required to change the motion of an object, or accelerate the object. Often forces are balanced, so net force = 0, so motion does not change.\n\nWork is in the same units as energy, not force. Work is related to force by \nW = F*d*cos(theta) where F is the applied force, d is the distance through which the force has been applied, and theta is the angle (if any) between the force and the distance. \n\nFor example if a 100 Newton vertical force is applied to lift an object to a table 5 meters above the starting point, 500 Newton*meters, or 500 joules, of work have been done.
13196
The strong force holds quarks together in combinations that make protons and neutrons.  It also holds the protons and neutrons together, but in a more subtle way, because protons and neutrons are color neutral.  This means that protons and neutrons don't have excess color charge (which determines the strength of the strong interaction), and by this logic shouldnt be attracted to each other.  The quarks are not in a point-like configuration, though, so each nucleon has a "dipole" and higher order moments. If you've never heard of this kind of thing, it's the same idea as the electric force holding electrically neutral atoms together to make chemical compounds.\n\nThe differences in mass between atoms and the sum of their particles is a consequence of the strong force... the strong force is not caused by the mass difference.  In fact, atoms above iron have a mass which is larger than the sum of their nucleons, while atoms below iron have mass that is smaller than the the sum of their nucleons.  That's why you can only break large atoms for energetic nuclear fission.
958110
Putting it simply:\nEffort force, is force that must be applied to do something,eg, to push a block.\nResistance force, is the force which restricts the movement,eg, the friction of the block with the ground.
671791
In physics, a force is anything that causes a body with mass to accelerate. The net (or resultant) force is the sum of all the different forces acting on a body.\n\nForce is a vector quantity defined as the rate of change of momentum induced by the force, and therefore has a direction associated. The SI unit for force is the newton.
961066
Your right - gravity is ludicrously weak. The force of gravity of the entire earth on your body is held back by the electrostatic force of a single layer of atoms in your shoes. Gravity is weaker by many orders of magnitude than every other force in the universe.\n\nAnd its a good job it is. Because otherwise we would not exist. \n\nHowever, we have no theory as yet that explains the relative magnitude of forces. It is considered one of the failings of the theories of physics - the parameters that determine the magnitude of the forces simply have to be fed into the equations from observation.
1156730
force=mass*acceleration\nforce/area=pressure (usually measured in p.s.i. [pounds per square inch])
30388
Gravity, the strong nuclear force, the weak nuclear force, and electromagnetic force.
113961
Simple explanation:\n- - - - - - - - - - - -\n\nThere are four fundamental forces that act on objects:\n\nGravity\nElectromagnetism\nWeak (responsible for radioactive decay)\nStrong (holds the nucleus together)\n\nFrom Newton's 2nd law, a force F= m a where m is the mass of the object and a is its acceleration (acceleration describes how an object changes speed, so it has to do with movement of the object). \n\nGravity is one of the 4 possible choices for F. So when the force of gravity exists, things accelerate, according to Newton's 2nd law. \n\nDeeper Exploration:\n- - - - - - - - - - - - - \n\nOne can ask the question, but WHY does gravity create a force? Einstein described it in the general theory of relativity as a bending of the space we live in (called spacetime: 3 space dimensions and one time dimension), and then specified that objects are required to take the shortest path in this curved space. \n\nHowever, that still does not describe WHY gravity does this. Current belief (but not yet proved) is that two objects with mass exchange messenger particles called gravitons (not yet observed) that communicate the force of gravity between then (electromagnetism has photons, or light as messenger particles, weak and strong forces also have messenger particles, so people think that gravity should as well). \n\nAnother interesting thread of thought in physics is that all 4 of the four fundamental forces are aspects of the same thing (just like electricity and magnetism are aspects of the same thing). So far, weak forces and electromagnetism have been shown to have the same origin when looked at in the right way, and it is possible that the strong force has the same origin as well (called a Grand Unified Theory, or GUT). Physicists are trying to find a framework whereby all 4 forces are aspects of the same universal force (called a Theory of Everything, or TOE).\n\nHowever, one can still ask, why is it this way? Well, although we have a few theories here and there, very little is proven, and the basic bottom line is, we do not know WHY gravity makes things move. \n\nBut we have a lot of clues and equations and we can make very accurate predictions for how gravity works in many cases.
938015
It's not exactly a binding force like the strong.  I haven't run across any way it affects orbiting electrons.  See the reference for some info.  But it seems to me like a force without an identity.  Its range is extremely short.
755262
INERTIA IS THE PROPENSITY FOR AN OBJECT IN MOTION TO REMAIN IN MOTION.  FORCE IS THE ENERGY ONE OBJECT PROJECTS ON ANOTHER.  SO IT IS THE ENERGY OF AN OBJECT IN MOTION EXERTED ON OTHER OBJECTS.
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"