Units Mismatch in Analytical Mechanics Textbook

In summary, the terminal velocity of a spherical object, taking into account linear and quadratic terms, is given by the equation vt=[(mg/c2)+(c1/2c2)2]1/2-c1/(2c2). This expression includes the drag coefficients c1 and c2, where c1 has units of Mass/Time and c2 has units of Mass/Length. This results in the units of c1/c2 being Length/Time, which matches with the units of mg/c2, Length^2/Time^2. Therefore, the units do match in this equation.
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shanepitts
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In my Analytical Mechanics textbook it states that the terminal velocity of a spherical object, whilst taking the linear and quadratic terms into consideration, is

vt=[(mg/c2)+(c1/2c2)2]1/2-c1/(2c2)

The units don't seem to match here. Is this normal?

This is not a homework inquiry, it for personal reviewing.
 
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  • #2
Why don't they match? I think your c1 and c2 are from the expression Fdrag = c1 * v + c2 * v^2. Then the units of c1 are Mass/Time, and the units of c2 are Mass/Length. With these units, the units of c1/c2 is Length/Time, and the units of mg/c2 are Length^2/Time^2, and everything matches.
 
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What is units mismatch in analytical mechanics?

Units mismatch in analytical mechanics refers to the situation where the units of measurement used in a problem do not match the units used in the equations or formulas being used to solve the problem. This can lead to incorrect solutions and should be avoided in order to ensure accurate results.

Why is units mismatch important in analytical mechanics?

Units mismatch is important in analytical mechanics because it can lead to incorrect solutions and a lack of understanding of the underlying physical principles. It is important to use consistent units of measurement in order to accurately analyze a system and make accurate predictions.

How can I identify units mismatch in a problem?

Units mismatch can be identified by carefully checking the units used in the problem and comparing them to the units used in the equations or formulas. If the units do not match, there may be a units mismatch that needs to be addressed.

How can I fix units mismatch in analytical mechanics?

Units mismatch can be fixed by converting all units to a consistent system of measurement. This can be done by using conversion factors or by converting all units to base units. It is important to double check all conversions to ensure accuracy.

What are the consequences of ignoring units mismatch in analytical mechanics?

Ignoring units mismatch in analytical mechanics can lead to incorrect solutions and a lack of understanding of the underlying physical principles. It can also lead to confusion and errors in calculations. It is important to address units mismatch in order to ensure accurate and meaningful results.

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