Posts tagged with "Reference Frames":

Sonic (The Hedgehog) Speed

Sonic is a blue hedgehog from a series of SEGA video games (dating back to just after the Mario games came out) that collects rings and goes fast. In fact, going fast is the premise of most of the Sonic the Hedgehog games, with the primary goal of each level being getting from the beginning to the end as quickly as possible (and hopefully looking rad on the way). One of the level elements that appears many a time is a loop-the-loop, both to demonstrate how fast Sonic is moving, and to be a barrier which cannot be surmounted unless Sonic is moving at the necessary high velocities. So, this brings us to the question: how fast does Sonic need to go to complete a loop-the-loop without falling?

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