JEE Main 2018 — Rotational Motion Question with Solution
From: JEE Main 2018 (Online) 15th April Morning Slot
Question
A uniform rod is suspended from a point at a variable distance from , as shown, To make the rod horizontal, a mass is suspended from its end A(m,x)$$ values is recorded. The appropriate variables that give a straight line, when plotted, are :
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
Here, let the length of the rod is = and mass = m.
In equilibrium, torque about point of suspension x,
mg x =
mx = M mx
m =
Comparing this straight line equation, y = mx + c
This is a straight line equation when we plot with variable m and .
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 2018, 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.