what is the unit of force? Is it kgm/s or N? help i'm confused.....

Question

anonymous · Answer

N

jamesj · Answer

One Newton is defined as one kg.m/s^2

1 N = 1 kg.m/s^2

anonymous · Answer

ok but there is this physics problem concerning the force of a bacteria....my teacher's answer was in kgm/s but most of the students in the class put N! what to do?

jamesj · Answer

I'm sure he/she meant to write kg.m/s^2, as kg.m/s is NOT a unit of force.

anonymous · Answer

ok then i will write it your way..is it 2 or -2?

jamesj · Answer

$$ \frac{kg.m}{s^2} = kg.m.s^{-2} $$
This comes from Newton's second law,
$$ F = ma $$
The units of mass, m, is kg. The units of acceleration a, is m/s^2. Hence the units of force is

kg.m/s^2

anonymous · Answer

excellent!! thank you!|dw:1359674319081:dw|