# physics

in Melbourne there used to be a huge shopping centre called "diamaru" built around an old "shot tower". hot lead globules were poured from the top of the tower which fell into a large pool of water at the foot of the tower. in this way spherical lead shot was made; hence the name.

why does the lead form into spherical globules in this process?

and what's one assumption you made which is probably in error and would result in a shorter tower for the iron ball bearing scenario?

I would think on the ratio of air resistance to weight. Air resistance tends to flatten the sphere, slow it down.

Of course, cohesion is the binding force that makes the sphere, and in a zero gravity (or free fall), the mass would assume a sphere shape.

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