Physics

Problem

A string supports a disturbance described by

y = 0.05\sin(3x + 15t)

, where

x

is in metres and

t

in seconds. Identify the direction of propagation and the speed of the wave. a) Positive

x

\!-direction,

5\,\text{m\,s}^{-1}

b) Positive

x

\!-direction,

7.2\,\text{m\,s}^{-1}

c) Negative

x

\!-direction,

5\,\text{m\,s}^{-1}

d) Negative

x

\!-direction,

0.2\,\text{m\,s}^{-1}