What is the unit for impulse?

A. kg-N

B. kg-m/s2

C. N-s

D. J

"Impulse" is (force applied) x (time that the force lasts).

[Force] x [time] units are [Newton] x [second].

If you go a little farther, it turns out that 'impulse' directly

produces a change in momentum, so it should have the

same units as momentum ... [mass] x [speed].

In fact, it does! But I doubt that you want me to go into that

right now, since you really didn't ask about it. So you'll just

have to take my word for it: Impulse and momentum both have

the same units.