Consider a semi-infinite elastic string that extends along the x-axis from x = 0 to infinity and let u(x, t) be its deflection about the equilibrium position. Suppose that the endpoint at x = 0 is free to move vertically, so that axu (0, t) = 0. At some time, denoted as t = 0, the string is suddenly hit such that the initial deflection and velocity can be idealised as u(x,0) = 0, du(x,0) = g(x) = 508(x - 20), respectively. Determine u(x, t) for t> 0 using a suitable type of Fourier transformation. Leave your final answer in terms of the signum function (see below).

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter14: Discrete Dynamical Systems
Section14.3: Determining Stability
Problem 13E: Repeat the instruction of Exercise 11 for the function. f(x)=x3+x For part d, use i. a1=0.1 ii...
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Write clearly how to express final answer in terms of signum function. 

Consider a semi-infinite elastic string that extends along the x-axis from x = 0 to infinity and let
u(x, t) be its deflection about the equilibrium position. Suppose that the endpoint at x = 0 is
free to move vertically, so that axu(0,t) = 0. At some time, denoted as t = 0, the string is
suddenly hit such that the initial deflection and velocity can be idealised as
u(x,0) = 0,
respectively. Determine u(x, t) for t > 0 using a suitable type of Fourier transformation. Leave
your final answer in terms of the signum function (see below).
du(x,0) = g(x) = 508(x − 20),
-
You may find the following formula useful:
S
sin(as)
S
sgn(x) =
ds
=
=
TT
where sgn(a) is the signum (or sign) function that that defined as follows
-1 for x < 0,
0
for x = 0,
1
for x > 0.
sgn(a),
Transcribed Image Text:Consider a semi-infinite elastic string that extends along the x-axis from x = 0 to infinity and let u(x, t) be its deflection about the equilibrium position. Suppose that the endpoint at x = 0 is free to move vertically, so that axu(0,t) = 0. At some time, denoted as t = 0, the string is suddenly hit such that the initial deflection and velocity can be idealised as u(x,0) = 0, respectively. Determine u(x, t) for t > 0 using a suitable type of Fourier transformation. Leave your final answer in terms of the signum function (see below). du(x,0) = g(x) = 508(x − 20), - You may find the following formula useful: S sin(as) S sgn(x) = ds = = TT where sgn(a) is the signum (or sign) function that that defined as follows -1 for x < 0, 0 for x = 0, 1 for x > 0. sgn(a),
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