what is the definitions of forces?
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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.
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Force is a push or pull that one object exerts on another. ex. when you play hand ball your hand exerts a force on the ball. The ball also exert a force on the your hand, the effect that you feel. Forces always exist in a pairs nothing exerts force without having a force exerted on it.
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Force - Newtons\nMass - Kilograms\nAcceleration - metres per second
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mass = the amount of matter, independant of gravity and in sci units measure in kg's\n\nweight= force, the downward pull on an object due to gravity, measure in N (newtons)
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AREA\n\nPressure (symbol: p) is the force per unit area acting on a surface in a direction perpendicular to that surface. Mathematically:    P=F/A\nwhere:\np is the pressure \nF is the normal force \nA is the area.
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Newtons are the SI unit of force.\n\nForce may also be measured in joules per centimeter, pounds force, atomic units of force, and several other units.
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Gravity, the strong nuclear force, the weak nuclear force, and electromagnetic force.
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there are only 2\n\n1 is that you have to apply a force, and 2 is that something has to happen ie. movement
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Coulombs law\nThe force is inverse proportional to the square of their distance d.\nIf d 3x bigger, then F 3^2 times smaller\nThe force is proportional to each charge.
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Gravity is the basic force. There is also a positive feedback effect; the more massive a cluster becomes, the more strongly it draws other particles and clusters toward it.
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Work equals Force * Distance,\nW = F*d\n\nSo you could say that work was proportional to the force applied or to the distance over which the work was done.\n\nWork also equals a change in energy, whatever energy that may be...kinetic energy, potential energy, what-have-you.\n\nIf some power is being exerted, work would be proportional to the time the power was being applied,\nW = P*t
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Newton's laws of motion.\nConservation of engery.\nConservation of momentum.
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Force, in physics, any action or influence that accelerates, or changes the velocity of, an object. Force is a vector, which means that it has both direction and magnitude. When several forces act on an object, the forces can be combined to give a resultant, or net force. The resultant force acting on an object, the object's mass, and the acceleration of the object are all related to each other by Newton's second law of motion, named after the 17th-century physicist and mathematician Isaac Newton. The second law of motion states that the acceleration an object experiences multiplied by the mass of the object is equal to the resultant force acting on an object. Thus, if a given force acts on two objects of different mass, the object with a larger mass will have a lower acceleration. See Mechanics.\n\nAn object experiences a force when it is pushed or pulled by another object. For example, shoving a stationary shopping trolley applies a force that causes the shopping trolley to accelerate. An object can also experience a force because of the influence of a field. For example, a dropped ball accelerates towards the ground because of the presence of the gravitational field; electrical charges attract or repel each other because of the presence of an electric field.\n\nUsually, several forces act on an object at once. If multiple forces combine to give a resultant force that is zero, then the object will not accelerate; the object will either remain motionless or continue moving at a constant velocity. For example, if a person pushes a shopping trolley with a force equal in magnitude to the force of friction that opposes the trolley's motion, the forces will cancel, giving a resultant force of zero. As a result, the trolley will move down the aisle with a constant velocity. If the person suddenly stops pushing, the only force acting on the trolley is the frictional force. Since the resultant force is no longer zero, the trolley accelerates: its velocity drops to zero. (An acceleration such as this, in which speed is reduced, is also known as deceleration.)\n\nIn SI units, the unit of force is the newton, which is the force that imparts to an object with a mass of 1 kg an acceleration of 1 m/sec2.
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In what domain? \nWith what force?\nWith what resistances?
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force=mass*acceleration\nforce/area=pressure (usually measured in p.s.i. [pounds per square inch])
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Newton's Laws of motion.Everything continues in its state of rest or motion unless acted upon by an external unbalanced force.
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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.