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Glossary Of Physics Terms
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Natural frequency:The frequency, with which a system oscillates in the absence of external forces, it depends on the size, composition, and shape of the object.
Newton:The unit of force, equal to the force that will produce an acceleration of 1m/s2 in a body of mass1 kg.
Newton's first law of motion:A body continues in a state of rest or of uniform motion in a straight line unless it is acted upon by an external (unbalanced) force.
Newton's law of gravitation:The gravitational force of attraction acting between any two particles is directly proportional to the product of their masses, and inversely proportional to the square of the distance between them. The force of attraction acts along the line joining the two particles.
Newton's second law of motion:The rate of change of momentum is directly proportional to the force applied.
Newton's third law of motion:To every action there is an equal and opposite reaction.
Nuclear fission:The splitting a heavy nucleus into more stable, lighter nuclei with an accompanying release of energy.
Nuclear force:The strong force that exists between the nucleons.
Nuclear fusion:The combination of two lighter nuclei to form a heavier nucleus with an accompanying release of energy.
Nucleons:A collective name for protons and neutrons.
Nucleus:The central, positively charged, dense portion of an atom.

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