Question

why is torque measured as Nm and not why not as N. I understood that torque is the force that causes an object to rotate around a pivot (o) but why is it Nm and not n?

Answer 1

Answer:

The reason is the perpendicular distance.

As it's also in motion as if you rotate a ball on the floor, except here it has been fixed at point

but covers a distance.

so the momentum= force X perpendicular distance

= N * m

= Nm

so this is how you derive Nm here