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Question
The arrow in following diagram shows the direction a sailing ship moves. What happens if a strong wind blows from the same direction?
The arrow in following diagram shows the direction a sailing ship moves. What happens if a strong wind blows from the same direction?
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Solution
The correct option is A The sailing ship moves faster
Answer is A.
Sailing faster than the wind is the technique by which vehicles that are powered by sails (such as sailboats, iceboats and sand yachts) advance over the surface on which they travel faster than the wind that powers them. Such devices cannot do this when sailing dead downwind using simple square sails that are set perpendicular to the wind, but they can achieve speeds greater than wind speed by setting sails at an angle to the wind and by using the lateral resistance of the surface on which they sail (for example the water or the ice) to maintain a course at some other angle to the wind.
Sailboats utilize both true wind and apparent wind. True wind is what we feel when were standing still and the wind is blowing. The wind an object feels when its in motion is apparent wind. One force pushes the sailboat, and the other force pulls, or drags it forward.
True wind always pushes a boat. If a boat sails absolutely perpendicular to true wind, so the sail is flat to the wind and being pushed from behind, then the boat can only go as fast as the windno faster. Thats not because theres no apparent wind; its because the apparent wind cant help the boat when its hitting flat against a big sail. But when the boat travels at an angle to the true wind, the apparent wind suddenly generates a powerful force that makes the boat move faster than the wind.
Hence, sailing ship moves faster as the boat is moving in the direction of the wind.
Answer is A.
Sailing faster than the wind is the technique by which vehicles that are powered by sails (such as sailboats, iceboats and sand yachts) advance over the surface on which they travel faster than the wind that powers them. Such devices cannot do this when sailing dead downwind using simple square sails that are set perpendicular to the wind, but they can achieve speeds greater than wind speed by setting sails at an angle to the wind and by using the lateral resistance of the surface on which they sail (for example the water or the ice) to maintain a course at some other angle to the wind.
Sailboats utilize both true wind and apparent wind. True wind is what we feel when were standing still and the wind is blowing. The wind an object feels when its in motion is apparent wind. One force pushes the sailboat, and the other force pulls, or drags it forward.
True wind always pushes a boat. If a boat sails absolutely perpendicular to true wind, so the sail is flat to the wind and being pushed from behind, then the boat can only go as fast as the windno faster. Thats not because theres no apparent wind; its because the apparent wind cant help the boat when its hitting flat against a big sail. But when the boat travels at an angle to the true wind, the apparent wind suddenly generates a powerful force that makes the boat move faster than the wind.
Hence, sailing ship moves faster as the boat is moving in the direction of the wind.
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