Question

Explain why objects moving in fluids must have special shapes.​

Answer 1

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Moving objects in fluid must have special shapes because the drag force or the friction force depends of the shape of the object. Special shapes are designed to minimize the opposing frictional force.

Answer 2

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❥ The fluid is the name given to a substance which begins to flow when an external force is applied to it.

❥ Objects moving in fluids face the friction of the fluid that opposes their motion.So,object moving in fluids must have unique shapes called streamlined shapes to reduce the fluid friction.

$\large{\boxed{\mathbb{\red{Notes :}}}}$ Streamline body is a body for which the drag force on objects moving in fluids is minimum.Streamline body represents a geometry for which the friction with fluid is low. It can simply defined as the geometry of a fish.