JEE Main 2023 — Rotational Motion Question with Solution
From: JEE Main 2023 (Online) 29th January Evening Shift
Question
A particle of mass 100 g is projected at time t = 0 with a speed 20 ms at an angle 45 to the horizontal as given in the figure. The magnitude of the angular momentum of the particle about the starting point at time t = 2s is found to be . The value of K is ___________.
(Take g = 10 ms)
This question includes a diagram. The text above accompanies the figure.
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Show full solutionCorrect answer: 800
Step-by-step explanation
Horizontal displacement
So torque of weight about point of projection is
kg m/s
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This is a previous-year question from JEE Main 2023, 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.