If you're talking about S.I. Unit then it must be "meter" (nothing else). Meter is the only S.I. Unit of length and it also uses in measuring the length of an automobile 'cause it varies from few meters to several thousand meters.
In short, Your Correct answer would be "meter" (m)
First we need to know the equation: F= Mass times acceleration F = 2.0 kg times 5.0 m/s^2 multiply them to get the net force! F= 10 N N is newton Hope this heps