JEE Main 2020 — Laws Of Motion Question with Solution
From: JEE Main 2020 (Online) 6th September Morning Slot
Question
An insect is at the bottom of a hemispherical ditch of radius 1 m. It crawls up the ditch but starts
slipping after it is at height h from the bottom. If the coefficient of friction between the ground and
the insect is 0.75, then h is :
(g = 10 ms–2)
(g = 10 ms–2)
Choose an option
Show full solutionCorrect option: C
Correct answer
C0.20 m
Step-by-step explanation
For balancing mgsin = f
mgsin = mgcos
tan = =
h = R – R cos
= R - R =
h = = = 0.2 m
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This is a previous-year question from JEE Main 2020, covering the Laws Of Motion 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.