Question

Which combination of fundamental units can be

used to express the amount of work done on an
object?
(1) kg•m/s (3) kg•m^2/s^2
(2) kg•m/s^2 (4) kg•m^2/s^3

Answer 1

The work spent during a move is given by the Definition of Word:


`T=F\Delta S \\ T=ma\Delta S`

Analizyng the units, we have:


`J=kg* (m)/(s^2) *m \\ \boxed {J= (kg*m^2)/(s^2) }`

Number 3

If you notice any mistake in my english, please let me know, because i am not native.