First slide

Dimensions of physical quantities

Question

Find the dimensional formula of Work or Energy.

Easy

A

Dimensionless
B

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

$[{ML}^{- 2} T^{- 2}]$
D

$[{ML}^{2} T^{2}]$

Solution

$Work or Energy = force \times displacement [Work] = [force] [displacement] = [M L T^{- 2}] [L] = [M L^{2} T^{- 2}]$

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