A wave speed in a piano string of linear density 5.0 g/m is 140 m/s. What is the tension in the string?

The tension in the string is 98 newtons.

Explanation:

Since a mecanical wave is propagated throughout the material of the string under tension, which is calculated by using the following formula:

(1)

Where:

- Tension in the string, in newtons.

- Wave speed, in meters per second.

- Linear density, in kilograms per second.

If we know that and , then the tension in the string is:

The tension in the string is 98 newtons.

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the correct choice is a .

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