A wire 4 meters long is stretched horizontally between points 4 meters apart. The wire is 25mm^2 in cross-section with a modulus of elasticity of 200,000 MPa. A load, W, placed at the center of the wire produces a sag.
1. Find the tension in the wire if sag is 30mm.
2. What is the magnitude of the load, W, if the sag is 54.3mm?
3. If W is 60N, what is the sag?
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