The length of a rubber cord floating on ...

The length of a rubber cord floating on water is 5 cm. The force needed to pull the cord out of water is ….N (surface tension of water is `7.2xx10^(-4)Nm^(-1)`).

`7.2xx10^(-3)`

`7.2xx10^(-4)`

`7.2xx10^(-5)`

`7.2xx10^(-2)`

Text Solution

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The correct Answer is:

`T=(F)/(2l)`

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