what is streamling? how does it reduce friction due to air resistance?
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All types of fishes (including whale) and marine animals have streamlined body to reduce friction during motion in water. Aeroplane is made streamlined to reduce drag in air.
A body moving through a fluid experiences a drag force, which is usually divided into two components: frictional drag, and pressure drag.
A streamlined body shape achieves a greater speed. A streamlined body shape is one that is narrow at both ends, and broad in the middle. This shape enables the animals to fly faster. Streamlined body shape Just like there is water resistance, there is a force called air resistance that opposes motion in air. When a bird is flying, its streamlined body shape helps to reduce air resistance.
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