Question

The dimensional formula of “Moment of force” is

• A. $\left[M^1{L}^1{T}^{-2}\right]$
• B. $\left[M^1{L}^2{T}^{-1}\right]$
• C. $\left[M^1{L}^2{T}^{-2}\right]$
• D. $\left[M^1{L}^1{T}^{-1}\right]$

Answer 1

Answer: (C)

Moment of force $=\vec{r}\times \vec{F}$
$=\left[L\right]\times \left[ML{T}^{-2}\right]$
$=\left[M^1{L}^2{T}^{-2}\right]$