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Unformatted text preview: Lecture U2 Mud: Units & Vectors Review (51 respondents) 1. What good is dimensional analysis? (1 student) With dimensional analysis you can determine many useful things about a physical problem or situation before you even solve it. Some examples: What units must the result have What is the minimum number of variables you need to describe the situation (the fewer the better!) What must me known to make the result applicable to other similar problems 2. What were the F and L entered into the equation when we did the dimensional analysis? (1 student) F is a generic term used for any force unit (N, lb, dyne, ...). L is a generic term used for any length unit (m, ft, cm, ...). Other symbols commonly used are T for a time unit, and M for a mass unit. 3. What is the physical meaning of the m unit? (1 student) Noninteger units are extremely rare, and Ive seen them only in fracture mechanics....
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This note was uploaded on 01/28/2012 for the course AERO 16.01 taught by Professor Markdrela during the Fall '05 term at MIT.
 Fall '05
 MarkDrela

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