The Laws of Motion

The relationship between upshot and execution was expressed by Sir Isaac Newton in his three laws of motion: (1) a proboscis at rest tends to remain at rest or a body in motion tends to remain in motion at a changeless speed in a straight line unless acted on by an external force, i.e., if the net unbalanced force is vigour, then the acceleration is zero; (2) the acceleration a of a mass m by an unbalanced force F is directly proportional to the force and inversely proportional to the mass, or a = F / m; (3) for every action there is an equal and opposite reaction. The leash law implies that the total momentum of a system of bodies not acted on by an external force remains constant (see conservation laws, in physics). Newtons laws of motion, together with his law of gravitation, provide a satisfactory basis for the explanation of motion of everyday seeable ends under everyday conditions. However, when applied to extremely high speeds or extremely minor objects, Newtons laws break down.

Motion at speeds come near the speed of light must be described by the theory of relativity. The equations derived from the theory of relativity reduce to Newtons when the speed of the object being described is very small compared to that of light.



When the motions of extremely small objects (atoms and elementary particles) are described, the wavelike properties of matter must be taken into account (see quantum theory). The theory of relativity also resolves the fountainhead of absolute motion. When one speaks of an object as being in motion, such motion is usually in reference to some other object which is considered at rest. Although a person sitting in a car is at rest with respect to the car, some(prenominal) in motion with respect to the earth, and the earth is in motion with respect to the sun and the center of the galaxy. All these motions are relative.

It was erstwhile thought that there existed a light-carrying medium, known as the luminiferous ether, which was in a state of absolute rest....If you want to get a full essay, order it on our website: Ordercustompaper.com



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