Help! I Need a Problem Involving Free Fall & Relative Velocity!

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LastBloomingFlower
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I have to make up or find a problem that invovles free fall velocity AND relative velocity! Can anyone find/make up a problem for that? HELP!
 
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Why not make a problem with two skydivers, where one jumps out of the plane a couple seconds ahead of another. Their velocities will function exponentially until terminal velocity, and you can give the speed of the first skydiver from the pilots perspective assuming his frame is inertial, then ask for the same speed as perceived by the second skydiver.