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Physics · Fluid Mechanics

JEE Main 2025 — 22 January, Evening Shift — Question 48

A small rigid spherical ball of mass MM is dropped in a long vertical tube

containing glycerine. The velocity of the ball becomes constant after some

time. If the density of glycerine is half of the density of the ball, then the viscous

force acting on the ball will be (consider g as

acceleration due to gravity)

  1. Option A:

    32Mg\frac{3}{2} \mathrm{Mg}

  2. Option B:

    Mg2\frac{M g}{2}

    Correct
  3. Option C:

    Mg

  4. Option D:

    2 Mg

Answer: B

Step-by-step solution

Conceptual

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Exam
JEE Main 2025
Paper
22 January, Evening Shift
Subject
Physics
Chapter
Fluid Mechanics
Topic
Buoyancy and Archimedes' Principle

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