When a mass of 25 kg is hung from the middle of a fixed straight aluminum wire,

Question

When a mass of 25 kg is hung from the middle of a fixed straight aluminum wire, the wire sags to make an angle of 12 ? with the horizontal as shown in the figure.(Figure 1)

Determine the radius of the wire.

Figure is shown here: http://session.masteringphysics.com/problemAsset/1058208/3/GIANCOLI.ch12.p66.jpg

When a mass of 25 kg is hung from the middle of a fixed straight aluminum wire, the wire sags to make an angle of 12 ? with the horizontal as shown in the figure. Determine the radius of the wire.

Explanation / Answer

the tensile stress in the wire is 1/4 of its max limit,
The tension in the wire can be compute however as:
2T(sin 12

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