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Physics help

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Physics help

by prowl123 » Sun Jan 20, 2013 10:24 am

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I'm doing a project in my physics class about freefall. I'm stuck on this one question about terminal velocity. It asks, when a skydiver reaches terminal velocity, why do they keep falling? I think it has something to do with the initial acceleration or perhaps Newton's first law of motion but I'm not entirely sure.

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Re: Physics help

by Jelze Bunnycat » Sun Jan 20, 2013 12:58 pm

Motto: "The only good is knowledge, and the only evil is ignorance."

Terminal velocity is actually very simple: it's the constant final speed reached when the fore of gravity and drag are in balance. In short, gravity can't make the object go faster, nor can drag slow it down more: the acceleration is thus exactly 0, but the speed is not.

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