JEE Main 2020PhysicsMechanical Properties of FluidsHardMCQ

JEE Main 2020 — Mechanical Properties of Fluids Question with Solution

JEE Main 2020 (04 Sep Shift 1)

Question

A air bubble of radius 1 cm in water has an upward acceleration of 9.8 cms–2. The density of water is 1 gm cm–3 and water offers negligible drag force on the bubble. The mass of the bubble is g = 980 cm/s2.

Choose an option

Show full solutionCorrect option: C
Correct answer
C4.15 gm

Step-by-step explanation

Fb−mg=ma

Fb=mg+a

=43πr3ρg=mg+a

m=43π1g=m980+9.8

m=4.15

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About this question

This is a previous-year question from JEE Main 2020, covering the Mechanical Properties of Fluids chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.