Problem an early submersible craft for deep-sea exploration, Ask an Expert

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Problem: An early submersible craft for deep-sea exploration was raised and lowered by a cable from a ship. When the craft was stationary, the tension in the cable was 5000 N. When the craft was lowered or raised at a steady rate, the motion through the water added an 1800 N drag force.

Part A: What was the tension in the cable when the craft was being lowered to the seafloor?

I need help to find the tension in the cable when the craft was being lowered to the seafloor.

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