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 Macrobe Jan17-13 11:31 PM

I have a question regarding Inertia. Exactly how much force, in Newtons, is required to overcome the inertia of exactly one kilogram of mass? It seems to me there must be some sort of quantity for it.

 LastOneStanding Jan18-13 12:18 AM

It depends on how fast you want to accelerate the object. The equation is ##\vec{F_{Net}} = m\vec{a}##, or in words, (net force acting on the object) = (mass of the object) x (acceleration of the object). This is Newton's second law. It takes, for example, 1 Newton of force to accelerate a 1kg object at 1m/s2.

 Macrobe Jan18-13 12:23 AM

Ah. Okay...not exactly what I was looking for, but what I was looking for was probably wrong ;) thanks.

 LastOneStanding Jan18-13 12:26 AM

Yes, if you were looking for some measure of a force required to overcome inertia that is independent of acceleration, then there's no such thing.

 BruceW Jan19-13 06:48 AM

yeah, it is pretty counter-intuitive that f=ma, because in our everyday lives, most of the time there are frictional forces.

 Tik Jan20-13 01:01 AM