Dimensional
Analysis Problems
If so instructed by your teacher, print out a worksheet page for these problems. Access each location in Table 1 and note the indicated equation. (Hint: Most slides explain the variables of the equation.) Perform a dimensional analysis on each side of the equations, reducing to fundamental units to verify validity. Table 2 is a chart of unit data and symbols to aid you in your work.
Sample problem: Dynamic Pressure equation: P = r * V2/2, where P stands for pressure and is measured in pa (pascals), r stands for density and is measured in kg/m3, and V stands for velocity and is measured in m/s. Step #1. pa = kg/m3 * (m/s)2
n/A = kg/m3 * (m/s)2 ----------- (pa = n/A) (kg * m/s2)/m2
= kg/m3 * ( m/s)2 ------------- (n = kg *
m/s2 and A = m2) Step #3. kg/(m * s2)
= kg/(m * s2) |
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Curator: Tom.Benson@grc.nasa.gov Responsible Official: Kathy.Zona@grc.nasa.gov |
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