Arope with a mass density of 1 kg/m has one end tied to a vertical support. you hold the other end so that the rope is horizontal and has a tension of 4 n. if you move the end of the rope back and forth, you produce a transverse wave in the rope with a wave speed of 2 m/s. if you double the amount of tension you exert on the rope, what is the wave speed? a. 2.8 m/s
b. 1.0 m/s
c. 2.0 m/s
d. 0.25 m/s
e. 4.0 m/s

Speed, v = 2.82 m/s

Explanation:

It is given that,

Mass per unit length of the rope,

Tension, T = 4 N

Wave speed, v = 2 m/s

Let v' is the speed of the wave when there is tension is doubled. The wave speed is given by :

If tension is doubled, means, T = 8 N

v = 2.82 m/s

So, if the tension is doubled, the wave speed 2.8 m/s. Hence, this is the required solution.

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