d²y dy dt² dt +c- Dirac delta function and F m- = -mg + Fod(t-1) in the 1. CUL
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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You do not need to show work for decomposing partial fractions

Transcribed Image Text:Ps) Consider a tennis ball falling in a vertical direction, subject to gravitational
force and air resistance, described by the second-order differential equation
(0.1)
where m is the mass of the object, c is the friction coefficient, y(t) represents the height of the
object above the reference point y = 0 which is the ground and g is the acceleration due to
gravity. Additionally, the ball is released from rest at an initial height, that is y(0) = yo > 0,
and with an initial velocity of zero, that is y' (0) = 0.
(b)
401
para
y (0)
char
no 0.
m
d²y dy
+ c
dt²
dt
m
= -mg
for the uni
Note that
the limit as t goes to intim
Now, a tennis player is going to hit (perfectly vertically) the tennis ball u ward
at t = 1, incorporating an impulse in the ODE as follows
dy
d²y
+ c
dt² dt
2011
= -mg + Fod(t-1)
Ad on a well as the
(0.2)
where 8(t) is the Dirac delta function and Fo≥ 0 is the strength of the impulse. Use the
Laplace transform to solve (0.2) with initial conditions y(0) = yo and y' (0) = 0. Your
solution y(t) should depend on t as well as the parameters m, c, g, yo and Fo.
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