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Drag

esmith

Entry posted by esmith

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An aspect of drag force I had not considered before was momentum. When an object runs into air molecules, momentum is conserved. This would imply that resisting force is caused by the bombardment of the object by air molecules. Since momentum is directly proportional to velocity, it would stand to reason that drag force is also proportional to velocity. Additionally, it makes sense that by changing the momentum of the air molecules, a force is exerted. This force acts to slow the object down (or keep it aloft in the case of an airplane). Of course, air resistance is much more complicated than that and must look at infinitely more factors, but the idea of air resistance as conservation of momentum was interesting

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