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Saturday, 31 October

JEE Main 2022 · PhysicsNumerical answerNumerical valueHardMulti-step

JEE Main 27 July 2022, Shift 1, Physics Q59

Question 59 of 90 in this shift, Physics question 29 of 30, Section B.

A pulley of radius 1.5 m is rotated about its axis by a force F=(12t−3t2)F=(12t-3t^2) N applied tangentially (while t is measured in seconds). If moment of inertia of the pulley about its axis of rotation is 4.5 kg m2^2, the number of rotations made by the pulley before its direction of motion is reversed, will be Kπ\frac{K}{\pi}. The value of K is____.

Official answer

18

NTA final key.

Chapter
System of Particles and Rotational Motion
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.