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Friday, 9 October

JEE Main 2020 · PhysicsMultiple choiceSingle correctHardMulti-step

JEE Main 6 September 2020, Shift 2, Physics Q10

Question 10 of 75 in this shift, Physics question 10 of 25.

When a particle of mass m is attached to a vertical spring of spring constant k and released, its motion is described by y(t)=y0sin⁡2ωty(t)=y_0\sin^2\omega t, where 'y' is measured from the lower end of unstretched spring. Then ω\omega is :
  1. (1)gy0\sqrt{\frac{g}{y_0}}
  2. (2)2gy0\sqrt{\frac{2g}{y_0}}
  3. (3)g2y0\sqrt{\frac{g}{2y_0}}Official answer
  4. (4)12gy0\frac{1}{2}\sqrt{\frac{g}{y_0}}

Official answer

Option 3

NTA final key (Sep 2020).

Same idea in other shifts

Asked 2× in all
  1. 5 Apr 2026, Shift 2 · Q35Match List - I with List - II. List - I A. sin⁡2ωt\sin^2\omega t B. sin⁡3(2ωt)\sin^3(2\omega t) C. sin⁡(ωt)+cos⁡(πωt)\sin(\omega t)+\cos(\pi\omega t) D.…HardMatch the list

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 42 of the 174 JEE Main shifts held from 2017 to 2026.