Particles Challenge Question  

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Say a particle is set in orbit around a circular planet with uniform density on the surface (or a billionth of a nanometer above the surface) with no friction, and another particle is dropped, from rest, through the center of the planet. Just to simplify the problem, assume the planet is uniform and fluid, so the particle can pass through the planet without friction. Which one can go half-way around the circular planet of radius "r" quicker? Assume only Newtonian mechanics for this.

That one guy that's always on

 
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I got that the particles tie.

PlanckTime - Amin

Yep

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