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.
Sailing Ships – Question 18. One advantage of using a kite sail is that it flies at a height of 150 m. There, the wind speed is approximately 25% higher than down on the deck of the ship.At what approximate speed does the wind blow into a kite sail when a wind speed of 24 km/his measured on the deck of the ship? *
Answers
Given : kite sail flies at a height of 150 m. There the wind speed is
approximately 25% higher than down on the deck of the ship
a wind speed of 24 km/h is measured on the deck of the ship
To Find : approximate speed does the wind blow into a kite sail
Solution:
Speed at deck = 24 km/hr
Speed kite sail is approximate 25% higher
Hence
approximate speed the wind blow into a kite sail = 24 + (25/100)24
= 24 + 24/4
= 24 + 6
= 30 km/hr
approximate speed the wind blow into a kite sail = 30 km/hr
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Answer:
One advantage of using a kite sail is that it flies at a height of 150 m. There, the wind speed is approximately 25% higher than down on the deck of the ship.At what approximate speed does the wind blow into a kite sail when a wind speed of 24 km/h is measured on the deck of the ship? *