First slide

Dimensions of physical quantities

Question

Find the dimensional formula of Pressure.

Easy

A

$[{ML}^{- 1} T^{- 1}]$
B

$[{ML}^{- 1} T^{- 2}]$
C

$[{ML}^{- 1} T^{- 3}]$
D

Dimensionless

Solution

$Pressure = \frac{Force}{Area} [Pressure] = \frac{[Force]}{[Area]} = \frac{[ML T^{- 2}]}{L^{2}} = [{ML}^{- 1} T^{- 2}]$

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