# Understanding Dimensions of Translational Motion in MCAT Physics

As a pre-med student preparing to take your MCAT, you want to ensure you have a solid foundation in Translational motion for the physical sciences section, not just in terms of how to solve equations and apply formulas, but also a conceptual understanding of the information.

Depending on the type of physics course you took in college, you would have learned how to solve translational motion questions in 1, 2, or 3 dimensions. Yet for the MCAT you only have to worry about solving kinematics questions in 1 or two dimensions, or sometimes a combination of the two.

Understanding the nature of these dimensions will be the first step in mastering MCAT physics. The concept of 'one dimension' refers to motion occurring in a single direction. The direction can face any which way but will never veer off course.

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Common single dimension problems in MCAT physics will refer to motion happening in the x-direction, or in the y-direction.

Just because the two are oriented 90 degrees from each other, doesn't change they fact that they each represent a single direction.

In fact, you can even break from tradition in terms of what you call your 'x' or 'y' direction. The traditional graph you learned in school had you draw a line parallel to the horizontal as the x-direction, and other line perpendicular to the horizontal or parallel to the vertical as your y-direction.