Question

A wave is represented by the equetion
`y=7 sin(7pi t-0.04pix+(pi)/(3))`
x is in metres and t is in seconds. The speed of the wave is
A. `175 m//s`
B. `49pi m//s`
C. `49//pi m//s`
D. `0.28 pi m//s`

Answer 1

Correct Answer - a
standard equation
`y=A sin (omegat -kx+phi_(0))`
In a given equetion `omega=7pi, k=0.04pi`
`v=(omega)/(k)=(7pi)/(0.04pi)=175 m//s`