Question

Which of the following is derived units of work?

• A. kg m${}^2$ s${}^{-2}$
• B. kg m${}^2$ s${}^2$
• C. kg m${}^2$ s${}^{-3}$
• D. kg m${}^2$ s${}^{-1}$

Answer 1

The correct option is A kg m${}^2$ s${}^{-2}$

Work done by a force $W=FS$
Units of work $W=kg.m{s}^{-2}\times m=kg{m}^2{s}^{-2}$