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# Why do i need to know position function ?

portoruj | Student, Grade 10 | eNoter

Posted July 2, 2011 at 7:54 PM via web

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Why do i need to know position function ?

Tagged with position function, science

giorgiana1976 | College Teacher | Valedictorian

Posted July 2, 2011 at 8:04 PM (Answer #1)

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The movement of any object may be described when we know the position that the object occupies at any given time.

Usually, the position of an object varies in time, therefore the position function is written as x(t).

There are many functions that can be used to describe the way of changing of position of the object with time.

For instance, if the position of the object changes linearly with time, the position function is given by the expression: x(t) = x0 + v*t.

Also, if the position of the object changes quadratically with time, the position function is given by the expression: x(t) = x0 + v0*t + a*t^2/2.

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