what are different kinds of forces and wht do they do?
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At the most basic level, forces are things that change how fast something is moving, or the direction in which it is moving, or prevent other forces from doing the above two things, or reduce their effectiveness.\n\nGravity is a force. Unless you're stopped from falling by something in the way (like the ground), you start to accelerate, downwards. Air resistance is another force, which could either slow your fall down, if you deployed a parachute, or at least reduce your acceleration (so whilst you're falling quicker each second, the rate at which you are accelerating is decreasing). Surface friction is another force, which stops the bottom of the tyre of a car from moving whilst it's pushed into the ground, meaning that when the wheel spins, the body of the car accelerates instead.\n\nThere's tensions, preventing weights at the end of strings from falling towards the earth, or if you're whizzing an object on the end of the rope around your head, these are centripetal forces which stop it from continuing outwards at  a tangent. There's torsional forces, when things twist, too, as well as compressions.\n\nThere are electrostatic forces, where charged objects attract and repel each other, magnetic forces, where magnets do the same. There's also the strong nuclear force which binds atoms together.
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Force is a vector quantity as it has both magnitude (size) and direction.
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In all the phenomenon force is the rate of change in momentum.\n\nBut the cause of change in momentum is different for different phenomenon.\n\nThe inertial force is caused by the collision of two objects;\n\nThe gravitational force is caused even when the objects are separated.\n\nThe concept of field of force comes in.\n\nThe electro-static force is caused because of charges and is acting on the masses and acting at distances.\n\nHere again the concept of field of force comes in.\n\nThere is close range attraction of forces and repulsion of forces in nuclei.\n\nThus it is natural to think of a cause which is the origin of force.\n\nYou have understood the uniqueness of force in these entire phenomenons.\n\nBut the cause is not unique.\n\nI don’t know whether it has been found or not.
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Hi, \n\nStretching force is usually called tension. I hope that's what you're asking.\n\nMatt
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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.
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That's more physics than chemistry! But anyway...\n\nA buoyant force, is that force which tries to push a body out of a medium.  Like put a ball in water, and there's a force which pushes it back up.\n\nThis mass of medium displaced is obtained by multiplying the volume of the medium displaced due to the ball by the density of the medium.  By multiplying the mass with acceleration due to gravity (9.8 ms-2 on Earth), you get the buoyant force.
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force=mass*acceleration\nforce/area=pressure (usually measured in p.s.i. [pounds per square inch])
611013
Oh good grief.  If it's anything like what I've just done it'll include velocity, centrepetal forces, magnetic fields, friction, gravity, forces generally, working out the mass of something and the speed at which it will fall, balances with pivot points, static electricity, AC & DC electricity, transformers, vectors and so on and so on.  It's quite hard but it's maths based so if you like maths, you should be ok.  I wish you luck.
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gravity, strong force, weak force, and electromagnetivity
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Gravity holds things with mass together.\n\nElectromagnetism holds things with unlike electric charges together.\n\nThe strong nuclear force holds things with colour charge together over short range.\n\n\nHope this helps!\nThe Chicken
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Force is some thing that alters the state of things. According to Newton's second law of motion force produce acceleration in a mass object - either by putting it to motion from a state of rest or from a slower speed, or by slowing things down. In either way F= ma or F = -ma (slowing down).Where F is force, 'm' is unit mass, and 'a' stands for acceleration, and '-a' for deceleration.\nBasically it is about change - change in inertia.\n\nWhereas momentum M= mv is not about change in inertia but about inertia itself. You see every thing in universe if composed of mass and energy. Energy  of a stationary object of of 1 kg is not same as that of an object of same mass moving with certain speed.\nSo momentum is a product of mass and velocity of the object.\nAnd force in lay man's term is a means of transferring energy from on object to an other.
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try the formulas:\n\nforce = mass * aceleration\n\nwork = force * distance\n\n\n\n\nWell i dont speak english very well, but i hope i help u.\n\nKisses
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Gravity. The force itself is one of the weakest in science, and somewhat confounds the scientific community to how weak it really is comparison to such forces as Strong Nuclear force.
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A 'force' is just a convention.\n\nWhen things happened, such as someone pushed a physics book across a table, some people were curious and believed it was necessary to quantify what was happening.  They devised a set of conventions such as mass, motion, and acceleration.  When an object wasn't moving, and then later was moving, they said that something had acted on it, and they called that something a 'force'.\n\nThen they were able to relate these terms in mathematical equations, such as F=ma; this made it possible to predict what would happen in certain circumstances, so people knew that these conventions were useful.
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We shall apply logic and find answer.\n\nForce is a push or pull.\nWhen A pushes or pulls B, in Physics, we say A exerts a force on B\nWhen A exerts a force on B, three things may happen. 1. B is accelerated.  2. B is moving with constant velocity. 3. B is in rest.\n\nB is accelerated if no other forces except the one exerted by A acts on B. The other two happens when some other forces also act or not even a single force acts. \n \nWe shall consider the first case in which B is acted on by a force exerted by A.\n\nThere are three things which cannot be ignored when we speak of a force.\n1. “A” the one which exerts a force\n2. ‘The Force’ that acts on B.\n3. “B” the one on which the force acts. When the concept of force is understood “B” can a point.\n\n  The statement, “The force acts on B” implies that A is the cause of the force. \n\nHow can A apply a force? Physics answers, ‘Because it has energy to do so,’\n\nWhat happens to A and B when it exerts a force on B\nWhen there are no other forces except the one exerted by A on B, A looses energy and B gains energy.\n\nAs long as A exerts force on B, B is in motion (accelerated) by the force  \nIn Physics we say when a force acts, the one on which the force acts gains energy and the one that exerts the force looses energy and it is seen the gain and loss are equal.\n\n In cases 2 and 3, if we remove the extra forces acting on them the situation reduces to case 1 and the principle persists.
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The four fundamental forces are:\n\n1-Gravitational Force\n2-Electromagnetic Force (the force between charged particles - the photon is the mediator of this force)\n3-Strong (nuclear) Force - keeps nuclei bound together\n4-Weak Force (responsible for Beta decay of the nucleus)
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mass of the object\nforce of the magnet in a magnetic field\nthe object's own interference with the magnet