Question

Ninety-five percent of world trade is moved by sea, by roughly 50 000 tankers, bulk carriers and container ships. Most of these ships use diesel fuel. Engineers are planning to develop wind power support for ships. Their proposal is to attach kite sails to ships and use the wind’s power to help reduce diesel consumption and the fuel’s impact on the environment. Approximately what is the length of the rope for the kite sail, in order to pull the ship at an angle of 45° and be at a vertical height of 150 m, as shown in the diagram opposite?​

Answer 1

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