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प्रश्न
What is a streamlined body? How does it help in the movement of animals that fly or swim in water?
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उत्तर
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A streamlined body is one which is pointed at the ends and broad in the middle. When such a body travels through a fluid or gaseous medium it exhibits minimum friction or resistance. A body shape which is streamlined helps cut against the friction created by the medium around the moving body.
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Streamlined body lowers the friction drag between a fluid, air, or water and an object moving trough that fluid. Drag is a force that slows down motion. Streamlining reduces the surface area of the moving object.
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Streamlining reduces the friction of movement to a minimum thus decreasing overall drag. Fishes can save energy while swimming because of the streamlined body.
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