Two telephone poles are separated by 40 m and connected by a wire. A bird of mass 0.50 kg lands on the wire midway between the poles, causing the wire to sag 2.0 m below horizontal. Assuming the wire has negligible mass, what is the tension in the wire?

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Two telephone poles are separated by 40 m and connected by a wire. A bird of mass 0.50 kg lands on the wire midway between the poles, causing the wire to sag 2.0 m below horizontal. Assuming the wire has negligible mass, what is the tension in the wire?