First slide

Dimensions of physical quantities

Question

$[M L^{- 2} T^{- 2}]$ represents dimensional formula of which of the following physical quantities?

Moderate

A

Energy
B

Pressure
C

Torque
D

Pressure gradient

Solution

As, $[M L^{- 2} T^{- 2}] = \frac{[M L T^{- 2}]}{[L] [L^{2}]}$
$= \frac{F o r c e}{D i s \tan c e \times a r e a}$
$= \frac{\Pr e s s u r e}{D i s \tan c e}$
= Pressure gradient

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