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Question 5: By considering the expression x(z,t)=Ae"cos(bt+cz+d) what must the
coefficients a, b, c and d be in order for the motion to be simple harmonic motion
(SHM), damped harmonic motion (DHM) or travelling wave (TW)? (Here t is
time, z is position, A is amplitude)
a
d
SHM
DHM
TW

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