Physics Circle home Student Login

Home›Chapters›Viscosity PYQs›Terminal Velocity›Question 19

MHT CET 2025 (19 Apr, Shift 2) · Terminal Velocity

Terminal Velocity question from MHT CET 2025 (19 Apr, Shift 2)

Q19MHT CET 2025 · 19 APR · SHIFT 2Medium

Terminal Velocity

' nn ' small water drops of same size (radius rr) fall through air with constant velocity V. They coalesce to form a big drop of radius R. The terminal velocity of the big drop is

Show answer and solution

Answer: (a)

  1. v∝r2v \propto r^2 (same liquid, same density).
  2. v′V=R2r2⇒v′=VR2r2\dfrac{v'}{V} = \dfrac{R^2}{r^2} \Rightarrow v' = \dfrac{VR^2}{r^2}
  3. So the answer is (a).
Report a mistake

More questions on Terminal Velocity