Question

The equation of wave is y = 2 sin $\pi(0.5x - 200t)$ where x and y are expressed in cm and t in sec. The wave velocity is

• A. 100 cm/sec
• B. 200 cm/sec
• C. 300 cm/sec
• D. 400 cm/sec

Answer 1

Answer: (D)

400 cm/sec

Answer 2

$v = \frac{\omega}{k} = \frac{200\pi}{0.5\pi}$= 400 cm/sec