A rope is vibrated so that transverse waves propagate down it. if the distance between crests is 0.5 m and a new crest reaches the end every 0.4 seconds. what is the propagation speed of the wave?

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Physics

Ralph Mcbride

7 December, 20:40

A rope is vibrated so that transverse waves propagate down it. if the distance between crests is 0.5 m and a new crest reaches the end every 0.4 seconds. what is the propagation speed of the wave?

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Maritza Koch · Answer 1

The speed of a wave, V, is f * lambda. Where f is the frequency and lambda is the distance. If a new crest reaches the end every 4 secs; it takes 8s to cover the distance. Hence, f, which is the number of oscillations covered is 8s. So we have V = 8 * 5 = 40 ms^1.