- #1

Grasshopper

Gold Member

- 210

- 111

However, looking at the equations, even if the accelerations due to gravity of a feather and comet in free fall are the same, their respective force equations are not, since for the feather, F

_{f}= m

_{f}a is much smaller than the force equation of the comet, F

_{c}= m

_{c}a.

So, I was wondering if the fact that the more massive object also has more inertia than the feather has anything to do with it. By that I mean, while the comet is significantly more massive, the force required to move it is also much larger, which would (I'm assuming) exactly counter whatever additional force that the much larger mass supposedly pulling on the Earth would contribute, resulting in the mass of the comet not mattering at all with respect to its acceleration as it falls.

I'm not in any way married to this explanation, by the way. I am simply interested in the truth, even if my intuition is way off, so by all means please help me find the actual explanation (after all, the point is to develop physics intuition, not become a crank ;) ).

Thanks to all who reply.