Question

A transverse wave on a string is described by the equation
y (x, t) = (2.20 cm) sin [(130 rad/s)t + (15rad/m)x].
ii) Find the approximate speed of wave move moving along the string.

• A. 4.2 m/s
• B. 5.6 m/s
• C. 7.4 m/s
• D. 8.7 m/s

Answer 1

The correct option is D 8.7 m/s

$y=\left(2.20cm\right)\sin [\left(130rad/s\right)t+\left(15rad/m\right)x]$

speed of wave $\left(V\right)=\frac{w}{K}=\frac{130}{15}=8.67m/s\approx 8.7m/s$

$\therefore$ Option (D) is correct.