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What are the uses of air or water resistance?

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Air and water resistance are made use of in wind mill and water mill panchakki they are also used for producing electricity through water turbines and air turbines . read more

Some shapes, known as streamlined shapes, cause less resistance than others. Aeroplanes and cars are streamlined, so that they move through the air as easily as possible. Friction occurs when objects move through water or air. read more

A cyclist is used as an example to explain what air resistance is. Drag is mentioned. Two ways to reduce air resistance are stated: reducing the area in contact with air (by the cyclist ducking down or cycling behind someone else) and by being more streamlined (wearing smoother surfaces or a more streamlined helmet). read more

Unlike other resistance forces, drag depends directly on velocity, since it is the component of the net aerodynamic force acting opposite to the direction of the movement. Another way to put it would be to say that air resistance is the result of collisions of the object’s leading surface with air molecules. read more

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