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Physics equations5/29/2023 A road might twist and turn and explore all sorts of directions, but the cars driving on it have only one degree of freedom - the freedom to drive in one direction or the opposite direction. Motion along a curved path may be considered effectively one-dimensional if there is only one degree of freedom for the objects involved. So what good is this section then? Well, in many instances, it is useful to assume that an object did or will travel along a path that is essentially straight and with an acceleration that is nearly constant that is, any deviation from the ideal motion can be essentially ignored. This I can say with absolute metaphysical certainty. It would be correct to say that no object has ever traveled in a straight line with a constant acceleration anywhere in the universe at any time - not today, not yesterday, not tomorrow, not five billion years ago, not thirty billion years in the future, never. Given that we live in a three dimensional universe in which the only constant is change, you may be tempted to dismiss this section outright. These equations of motion are valid only when acceleration is constant and motion is constrained to a straight line. Given that such a title would be a stylistic nightmare, let me begin this section with the following qualification. For the sake of accuracy, this section should be entitled "One dimensional equations of motion for constant acceleration".
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