$\frac{Energy}{mass \times length\ } = \frac{\left\lbrack ML^{2}T^{- 2} \right\rbrack}{\lbrack M\rbrack\lbrack L\rbrack} = \lbrack LT^{- 2}\rbrack$
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.