The dimensional formula of a physical quantity is $[M^{1} L^{1} T^{- 2}]$ . What is its SI unit?

{k g s}^{- 2} m^{- 1}

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k g {m s}^{- 2}

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{k g}^{2} s^{2} m^{2}

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k g {m s}^{2}

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Solution

The correct option is B $k g {m s}^{- 2}$
The different dimensions represent the different physical quantity.
$M^{1}$ represents $k g$ , $L^{1}$ represents $m$ and $T^{- 2}$ represents $s^{- 2}$ .

Thus SI unit of that physical quantity is $k g m s^{- 2}$

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