JEE Main 2020 — Gravitation Question with Solution
From: JEE Main 2020 (Online) 5th September Evening Slot
Question
The acceleration due to gravity on the earth’s
surface at the poles is g and angular velocity of
the earth about the axis passing through the
pole is . An object is weighed at the equator
and at a height h above the poles by using a
spring balance. If the weights are found to be
same, then h is (h << R, where R is the radius
of the earth)
Choose an option
Show full solutionCorrect option: A
Correct answer
A
Step-by-step explanation
At equator, g1 = g - R
At height h, g2 = [as given h << R]
Weight same at poles and at h (so g1 = g2)
g - R =
At height h, g2 = [as given h << R]
Weight same at poles and at h (so g1 = g2)
g - R =
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Gravitation chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2020, covering the Gravitation 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.