The drag force on an object moving through a fluid depends on:
AOnly the colour of the object
BOnly the weight of the object
CThe speed of the object, its shape, and the nature of the fluid
DOnly the temperature of the surroundings
Answer & Solution
Correct answer: C. The speed of the object, its shape, and the nature of the fluid
Drag = fluid friction on a moving body. It increases with speed (so a fast cyclist feels more wind resistance than a slow one), depends on shape (streamlined shapes like fish or aircraft minimise drag), and depends on the fluid (drag in water is much greater than in air). Weight and colour are irrelevant.
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