JEE Main 2026 — Oscillations Question with Solution
JEE Main 2026 (24 January Shift 1)
Question
A cylindrical block of mass and area of cross section is floating in a liquid of density and with its axis vertical. When depressed a little and released the block starts oscillating. The period of oscillation is .
Choose an option
Show full solutionCorrect option: D
Correct answer
D
Step-by-step explanation
When the block is depressed by distance , the additional buoyant force is acting upward as restoring force.
Equation of motion: .
This gives .
Period of oscillation:
Equation of motion: .
This gives .
Period of oscillation:
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This is a previous-year question from JEE Main 2026, covering the Oscillations 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.