JEE Main 2017 — Rotational Motion Question with Solution
From: JEE Main 2017 (Online) 8th April Morning Slot
Question
In a physical balance working on the principle of moments, when 5 mg weight is placed on the left pan, the beam becomes horizontal. Both the empty pans of the balance are of equal mass. Which of the following statements is correct ?
Choose an option
Show full solutionCorrect option: C
Correct answer
CLeft arm is shorter than the right arm
Step-by-step explanation
From principle of moment we know, the anticlockwise moment is equal to clockwise moment when a system is stable or balance.
load load arm = effect effect arm
When 5 mg weight is placed on the left pan, load arm shift to left side, hence left arm become shorter than right arm.
load load arm = effect effect arm
When 5 mg weight is placed on the left pan, load arm shift to left side, hence left arm become shorter than right arm.
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This is a previous-year question from JEE Main 2017, 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.