What will happen if there are many objects with the same density but different size, all fall from the same height.
The terminal velocity v=\sqrt{mg/b}=\sqrt{\rho Vg/b}, so the terminal velocity is proportiobal to \sqrt{V} where V is the volume of the object.

The following simulation try to illustrate the size effect on terminal velocity.
The ratio of the mass for the object is 1:2:3:4:5:6:7:8:9
Because it is a 2D simulation, the radius is proportional to \sqrt{m}.

You can try it with different gravity g , or drag constant (Drag force = bv[sup]2[/sup])

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