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Saturday, 31 October

JEE Main 2024 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 31 January 2024, Shift 2, Physics Q33

Question 33 of 90 in this shift, Physics question 3 of 30, Section A.

A light string passing over a smooth light fixed pulley connects two blocks of masses m1m_1 and m2m_2. If the acceleration of the system is g/8g/8, then the ratio of masses is:

The figure, in words

Atwood machine: light string over a fixed pulley hanging from the ceiling; mass m1 hangs on the left (higher), mass m2 hangs on the right (lower).
  1. (1)43\frac{4}{3}
  2. (2)53\frac{5}{3}
  3. (3)81\frac{8}{1}
  4. (4)97\frac{9}{7}Official answer

Official answer

Option 4

NTA final key.

Chapter
Laws of Motion
Topic
Newton's Laws of Motion
Idea tested
Standard Atwood Machine

Same idea in other shifts

Asked 5× in all
  1. 5 Apr 2026, Shift 1 · Q29Three masses m1=4m_1 = 4 kg, m2=4m_2 = 4 kg and m3=6m_3 = 6 kg are suspended from a fixed smooth frictionless pulley as shown in the figure…MediumSingle correctHas a figure
  2. 6 Apr 2024, Shift 1 · Q32A light string passing over a smooth light pulley connects two blocks of masses m1m_1 and m2m_2 (where m2>m1m_2 > m_1). If the acceleration…MediumSingle correct
  3. 9 Apr 2024, Shift 1 · Q34A light unstretchable string passing over a smooth light pulley connects two blocks of masses m1m_1 and m2m_2. If the acceleration of the…EasySingle correct
  4. 26 Jul 2022, Shift 2 · Q48Two masses M1M_1 and M2M_2 are tied together at the two ends of a light inextensible string that passes over a frictionless pulley. When…EasyDiagram basedHas a figure

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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.