# Which of these is equal to "1 J"? Is it "kg"cdot"m/s"^2???

## a) ${\text{kg"cdot"m"^2"/s}}^{2}$ b) ${\text{kg"cdot"m""/s}}^{2}$ c) $\text{kg"cdot"m""/s}$ d) $\text{kg"cdot"m"^2"/s}$

May 30, 2017

No. Only the first one is correct.

${\text{1 J" = "1 N"cdot"m" ="1 kg" cdot "m"^2/"s}}^{2}$,

where ${\text{1 N" = "1 kg"cdot"m"/"s}}^{2}$.

The rest are...

b) $\text{kg"cdot"m/s"^2 = "force}$ ($\text{N}$, Newtons)
c) $\text{kg"cdot"m/s" = "momentum}$
d) $\text{kg"cdot"m"^2"/s" = "J"cdot"s}$ (Planck's constant)