Suppose one has wire in tension, tension force in Newtons as the unknown.

The wire goes over two stationary pulleys. Between them is a third pulley, that is able to move perpendicular to the wire travel. If I push this third middle roll with a known force and the wire deflects a distance X, what sort of calculation I need to find the tension in wire?

This is probably some very elementary solution, just can't get my head around it now. Thank you very much for help!

The wire goes over two stationary pulleys. Between them is a third pulley, that is able to move perpendicular to the wire travel. If I push this third middle roll with a known force and the wire deflects a distance X, what sort of calculation I need to find the tension in wire?

This is probably some very elementary solution, just can't get my head around it now. Thank you very much for help!

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