explain why object moving in fluids must have special shapes
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Objects moving in fluids faces the fluid friction which opposes their motion to reduce the fluid friction objects moving in fluids must have special shape and those shapes are called as streamlined shapes.
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Explanation:
When a body moves through a fluid, it experiences an opposing force which tries to oppose its motion through the fluid. This opposing force is known as the drag force. This frictional force depends on the shape of the body. By giving objects a special shape, the force of friction acting on it can be minimised. Hence, it becomes easier for the body to move through the fluid.
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