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Homework 8
Geog210a
Due: December 2, 2011
Problems from text
:
10.5.5, 10.5.11, 10.5.12, 10.6.9, 10.6.13, 10.7.1, 10.7.5 (use ICs x=1 & y=1), 10.7.13(plot with
Matlab), 10.7.15, 10.7.18, 10.8.5, 10.8.9, 10.8.18
DV Problems:
1. A Taco Smell
®
customer chokes on his Chile Cheese Chorizo Chimichunga (C4;
yum). An
observant customer notices the problem and administers the Heimlich maneuver, dislodging the
blockage and sending it hurtling across the restaurant (sic).
The Chile Cheese Chorizo
Chimichunga hits a wall 2.7 seconds after leaving the victim’s mouth and an observant customer,
being a savvy Geog 210a student, notices that the horizontal velocity of the projectile (in ft/s) can
be modeled as:
V(t) =
a
b + c t
where a = 5.7 ft/s, b = 1.2 (no units) and c = 0.7 (1/s).
How far away from the wall was the victim?
Remember V = d(distance)/dt.
Redo your solution using the ODE solver ODE45 in Matlab (see Matlab handout for information).
Plot out both your analytical solution results and Matlab’s numerical one.
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 Fall '09
 Davey

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