b. An infinitely long string with zero initial displacement is subject to the initial velocity 0, if x < -1 10(x+1), if −1≤x≤0 10(1-x), if 0
b. An infinitely long string with zero initial displacement is subject to the initial velocity 0, if x < -1 10(x+1), if −1≤x≤0 10(1-x), if 0
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
Related questions
Question
could you do part b please

Transcribed Image Text:i. Show by direct substitution that
= H (x + at),
1/H(x+at),
2
where H is an arbitrary function, is a solution to the wave equation
a²uxx, aЄR, t≥0, -∞ < x <∞.
Utt -
u(x, t): = 1/2H(x-
H(x − at) +
ii. Explain concisely how the initial displacement, u(x, 0), will evolve over time?
You may include a plot if it helps your explanation.
b. An infinitely long string with zero initial displacement is subject to the initial velocity
0,
if x < -1
10(x+1), if −1≤ x ≤ 0
10(1-x), if 0<x<1
if 1 < x.
(x) =
0,
If the wave speed is c = = 1, find the displacement of the string, u(x, t), at subsequent
times.
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