Lecture 1 Notes

Mv mg kv 2 felix baumgartners freefall from 40 km up

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Unformatted text preview: ￿ Felix Baumgartner’s freefall from 40 km up • Newton says Fnet=ma or ma = −mg + kv 2 • A differential equation in disguise because a=v ￿ • so the equation is really a DE for v(t)! mv = −mg + kv ￿ 2 Felix Baumgartner’s freefall from 40 km up • Newton says Fnet=ma or ma = −mg + kv 2 • A differential equation in disguise because a=v ￿ • so the equation is really a DE for v(t)! mv = −mg + kv ￿ 2 • Simple model to predict how fast he’ll go, how long it will take etc. Felix Baumgartner’s freefall from 40 km up mv = −mg + kv ￿ • Flaws with this model? 2 Felix Baumgartner’s freefall from 40 km up mv = −mg + kv ￿ • Flaws with this model? • g is not constant... 2 Felix Baumgartner’s freefall from 40 km up mv = −mg + kv ￿ 2 • Flaws with this model? • g is not constant... • ...but 6371 km ≈ 6411 km so not bad. Felix Baumgartner’s freefall from 40 km up mv = −mg + kv ￿ 2 • Flaws with this model? • g is not constant... • ...but...
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This note was uploaded on 02/12/2014 for the course MATH 256 taught by Professor Ericcytrynbaum during the Spring '13 term at UBC.

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