NEET2023PhysicsMechanical Properties of FluidsActual
The viscous drag acting on a metal sphere of diameter 1 ~mm , falling through a fluid of viscosity 0.8 ~Pa s with a velocity of 2 ~m ~s ⁻¹ is equal to
Options
- A1.5 10⁻³ ~N
- B20 10⁻³ ~N
- C15 10⁻³ ~N
- D30 10⁻³ ~N
Correct answer
C. 15 10⁻³ ~N
Step-by-step solution
Viscous drag acting on sphere is given by aligned F_V & =6 r V & =6 22 7 0.8 10⁻³ 2 2 & =15.08 10⁻³ ~N & 15 10⁻³ ~N aligned