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Question

Explain why objects moving in fluids must have special shapes.

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Solution

When a body moves through a fluid, it experiences an opposing force. This opposing force hinders the motion of the object and it is known as the drag force. This drag force depends on the shape of the body. The objects moving in fluid have a special shape to minimise the drag on it. These special shapes are called streamlined shapes.

The streamlined shape of objects allows the objects to cut through the fluid easily. Hence, it becomes easier for a streamlined body to move through the fluid.

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