Question

(a) Which of the following shape will have minimum drag and name a few devices in which they are used :
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Answer 1

Answer:

b will have a minimum drag

Explanation:

they are used in aeroplane, helicopter rocket

Answer 2

The correct answer to the question is option (b)

The object (b) will have the minimum drag.

Explanation:

The factors affecting the drag are as follows :

Shape and size of the object, velocity and direction of flow, and Mass, viscosity, and compressibility of air.

So, as the size of the object increases, the drag will also increase.

We can observe from the diagram that the surface area and the size of the object B is the minimum, thereby it experiences the least darg as compared to the other objects shown in the diagram.