Question

A wave is represented by the equation

y = 7 sin $\left( 7\pi t - 0.04x\pi + \frac{\pi}{3} \right)$x is in metres and t is in seconds. The speed of the wave is –

• A. 175 m/sec
• B. 49 pm/sec
• C. 49 pm/sec
• D. 0.28 pm/sec

Answer 1

Answer: (A)

175 m/sec

Answer 2

y = a sin[wt – kx + f]

\ v = $\frac{\omega}{K}$ ̃ v = $\frac{7\pi}{0.04\pi}$ = 175 m/s