JEE Main 2014 — Rotational Motion Question with Solution
JEE Main 2014 (06 Apr)
Question
A bob of mass m attached to an inextensible string of length is suspended from a vertical support. The bob rotates in a horizontal circle with an angular speed rad/s about the vertical. About the point of suspension :
Choose an option
Show full solutionCorrect option: C
Correct answer
CAngular momentum changes in direction but not in magnitude
Step-by-step explanation
. (Direction parallel to plane of rotation of particle)
as is perpendicular to , direction of L changes but magnitude remains same.
as is perpendicular to , direction of L changes but magnitude remains same.
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Rotational Motion 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 2014, covering the Rotational 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.