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Q.

Is it true that objects moving in fluids must have special shapes?


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a

True

b

False 

answer is A.

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Detailed Solution

 The above statement is True.
Drag is another name for the fluid's frictional force. When moving through fluids, objects must overcome the friction acting on them. So, they need to expend less energy in the process. Therefore, to reduce the expenditure of the energy, objects are given unique shapes, which reduces the friction due to which the items can move in fluid easily.
 
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