Question

What is the speed of the component wave ?

• A. 120 cm/s
• B. 240 cm/s
• C. 143 cm/s
• D. 287 cm/s

Answer 1

The correct option is A 120 cm/s

Speed of component wave of standing wave $y=Asin\left(kx\right)cos\left(\omega t\right)$ is

$\frac{\omega }{k}=\frac{40\pi }{\pi /3}=120cm/s$