# newtonian physics

Jun 17th, 2015
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In physics, motion is a change in position of an object with respect to time and its reference point. Motion is typically described in terms of displacement, direction, velocity,acceleration, and time.[1] Motion is observed by attaching a frame of reference to a body and measuring its change in position relative to that frame.

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Inphysics,motionis a change inpositionof an object with respect to time and its reference point. Motion is typically described in terms ofdisplacement,direction,velocity,acceleration, andtime.[1]Motion is observed by attaching aframe of referenceto a body and measuring its change in position relative to that frame.If the position of a body is not changing with the time with respect to a given frame of reference the body is said to beat rest,motionless,immobile,stationary, or to have constant (time-invariant) position. An object's motion cannot change unless it is acted upon by aforce, as described byNewton's first law. Momentum is a quantity which is used for measuring motion of an object. An object'smomentumis directly related to the object'smassand velocity, and the total momentum of all objects in an isolated system (one not affected by external forces) does not change with time, as described by thelaw of conservation of momentum. The study of motion deals with (1) The study of motion of solids (mechanics). (2) study of motion of fluids (fluid mechanics)As there is no absolute frame of reference,absolute motioncannot be determined.[2]Thus, everything in the universe can be considered to be moving[clarification needed].[3]:2021More generally, the term motion signifies a continuous change in the configuration of a physical system. For example, one can talk about motion of a wave or a quantum particle (or any othe

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