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# Newton laws of motion, interia, bouyancy

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• 1. Newton's First Law of Motion: I. Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it. This law is often called "the law of inertia". Newton's Second Law of Motion: II. The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector. Newton's Third Law of Motion: III. For every action there is an equal and opposite reaction. Inertia: The property of matter by which it retains its state of rest or its velocity along a straight line so long as it is not acted upon by an external force. Buoyancy: The power of supporting a body so that it floats; upward pressure exerted by the fluid in which a body is immersed.