Fluid Mechanics

JEE Main level, single correct, medium

4 of 192

Question 4 of 192

A spherical ball of radius rr falls with terminal velocity vv in a viscous liquid. The viscous drag force acting on the ball is proportional to:

Show answer and solution

Answer: (A) rvr v

By Stokes' law, F=6πηrvF = 6\pi\eta r v, hence viscous force is directly proportional to rvr v.

JEE Main question paper PDF

Open a shift to read the full paper on this page, or download it.

JEE Main 2025 Apr 2 Shift 1 question paper

Open Download PDF

Opening paper…

Explain it as a whiteboard videoStep-by-step, in Hinglish or English. Your first video needs no login.Solved it on paper but got it wrong?Upload a photo of your working. Mistake Doctor marks the exact line that broke.
See it move: Fluid mechanics simulationDrag the sliders and watch the numbers in this question change.

More Physics practice

JEE Main Physics practice question on Fluid Mechanics, with the answer and a step-by-step solution. Scan a question from your own book or paper to get a whiteboard video.