Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN: 9780470458365
Author: Erwin Kreyszig
Publisher: Wiley, John & Sons, Incorporated
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Question
A small cannonball with mass 4 kilograms is shot vertically
upward with an initial velocity of 190 meters per second. If
the air resistance is assumed to be directly proportional to
the speed of the cannonball, a differential equation
modeling the projectile velocity is
dv
m
= mg
mg - kv
dt
Assume that k
=
0.0025, and use g =
-9.8
meters/second².
Solve the differential equation for the velocity v(t). Don't
forget to include the initial condition.
v(t) =
=
Integrate the velocity to obtain the height h(t) as a
function of time. Assume the cannonball is launched from
ground level at t = 0.
h(t) =
Find the maximum height reached by the cannonball.
Max height =
meters
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Transcribed Image Text:A small cannonball with mass 4 kilograms is shot vertically upward with an initial velocity of 190 meters per second. If the air resistance is assumed to be directly proportional to the speed of the cannonball, a differential equation modeling the projectile velocity is dv m = mg mg - kv dt Assume that k = 0.0025, and use g = -9.8 meters/second². Solve the differential equation for the velocity v(t). Don't forget to include the initial condition. v(t) = = Integrate the velocity to obtain the height h(t) as a function of time. Assume the cannonball is launched from ground level at t = 0. h(t) = Find the maximum height reached by the cannonball. Max height = meters
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