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**[SOLVED] Tension in Strings HELP thanks!--very simple.**

## Homework Statement

A 16 kg object hangs in equilibrium from a string with a total length of L=5m and a linear mass density of u= 0.0010 kg/m. The string is wrapped around two light, frictionless pulleys that are separated by a distance of d=2.0m.

A) Determine the tension in the string.

B) At what frequency must the string between the pulleys vibrate in order to form the standing-wave pattern shown in Figure b)?

Picture is attached!

## Homework Equations

## The Attempt at a Solution

If there was an axis at the bottom of the inverted triangle and the angles were measured from the axis to the strings;

I have also tried using;

v = Square root of (tension/u), but I don't have v,

So i tried to find v using f = v/ wavelength, but i don't have frequency.

I have tried so many things and I can't seem to get a start. Any hints?

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