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Aristotle provided a philosophical discussion of the concept of a force as an integral part of Aristotelian cosmology.In Aristotle's view, the terrestrial sphere contained four elements that come to rest at different "natural places" therein.
Pressure, the distribution of many small forces applied over an area of a body, is a simple type of stress that if unbalanced can cause the body to accelerate.
Stress usually causes deformation of solid materials, or flow in fluids.
If the mass of the object is constant, this law implies that the acceleration of an object is directly proportional to the net force acting on the object, is in the direction of the net force, and is inversely proportional to the mass of the object.
Concepts related to force include: thrust, which increases the velocity of an object; drag, which decreases the velocity of an object; and torque, which produces changes in rotational speed of an object.
A fundamental error was the belief that a force is required to maintain motion, even at a constant velocity.
Most of the previous misunderstandings about motion and force were eventually corrected by Galileo Galilei and Sir Isaac Newton.Only four main interactions are known: in order of decreasing strength, they are: strong, electromagnetic, weak, and gravitational.Since antiquity the concept of force has been recognized as integral to the functioning of each of the simple machines.In an extended body, each part usually applies forces on the adjacent parts; the distribution of such forces through the body is the internal mechanical stress.Such internal mechanical stresses cause no acceleration of that body as the forces balance one another.In physics, a force is any interaction that, when unopposed, will change the motion of an object.A force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate.This law is an extension of Galileo's insight that constant velocity was associated with a lack of net force (see a more detailed description of this below).Newton proposed that every object with mass has an innate inertia that functions as the fundamental equilibrium "natural state" in place of the Aristotelian idea of the "natural state of rest".Force can also be described intuitively as a push or a pull.A force has both magnitude and direction, making it a vector quantity.