Correct Answer - Option 1 : 100
Concept:
Drag force is the resistance force caused by the motion of a body through a fluid, such as water or air. It acts opposite to the direction of motion. This is the relative velocity between the body and the fluid. It is given by:
\({\rm{F}} = \frac{1}{2}{{\rm{C}}_{\rm{d}}}{\rm{\rho A}}{{\rm{v}}^2}\)
Where,
Cd = Drag coefficient which depends on Reynolds Number, ρ = Density of medium/fluid, A = Projected area, and v is the velocity.
Cd values are:
\({{\rm{C}}_{\rm{d}}} = \frac{{24}}{{{{\rm{R}}_{\rm{e}}}}}\)
Calculation:
Given:
Reynolds number, Re = 0.24.
\({{\rm{C}}_{\rm{d}}} = \frac{{24}}{{{{\rm{R}}_{\rm{e}}}}}=\frac{24}{0.24}=100\)
