Question

A 1.5m long string weighs 0.0020 kg. It is tensioned to 100N. A disturbance travels along it with a wavelength of 1.5m, find:a) the propagation velocity of the wave

Answer 1

the propagation velocity of the wave is 274.2 m/s

Step-by-step explanation:

Given;

length of the string, L = 1.5 m

mass of the string, m = 0.002 kg

Tension of the string, T = 100 N

wavelength, λ = 1.5 m

The propagation velocity of the wave is calculated as;

`v = \sqrt{(T)/(\mu) } \\\\\mu \ is \ mass \ per \ unit \ length \ of \ the \ string\\\\\mu = (0.002 \ kg)/(1.5 \ m) = 0.00133 \ kg/m\\\\v = \sqrt{(100)/(0.00133) } \\\\v = 274.2 \ m/s`

Therefore, the propagation velocity of the wave is 274.2 m/s