(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Spherical planet has only one inhabitant that can move freely on the surface of the planet with speed u. A spaceship approaches the planet with velocity v. Show that if v/u > 10, the spaceship can always see the inhabitant regardless of his movement.

2. Relevant equations

No idea.

3. The attempt at a solution

I have no idea where to start. Is this supposed to be a relativistic problem or a classical mechanical one? Any hints are more than welcome!

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# Hide and seek on a planet

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