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What are the limitations of dimensional analysis? |
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Answer» Solution :Limitations of Dimensional analysis 1. This method gives no information about the dimensionless constants in the formula like 1, 2, ......`PI`,e, etc 2. This method is not suitable to derive relations INVOLVING trigonometric, exponential and logarithmie functions 3. It can only check on whether a physical relation is dimensionally correct but not the correctness of the relation. For example, using dimensional analysis, `s = ut + (1)/(3)at^(2)` is dimensionally correct WHEREAS the correct relation is`s = ut + (1)/(2)at^(2)` |
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