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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceDiagram basedHardDiagram reading

JEE Main 26 June 2022, Shift 2, Physics Q32

Question 32 of 90 in this shift, Physics question 2 of 30, Section A.

In the arrangement shown in figure a1,a2,a3a_1,a_2,a_3 and a4a_4 are the accelerations of masses m1,m2,m3m_1,m_2,m_3 and m4m_4 respectively. Which of the following relation is true for this arrangement ?

The figure, in words

Hatched ceiling at top with a pulley hanging from it; three pulleys in a chain, each lower pulley hanging lower and to the right of the one above, joined by strings. Small square blocks labelled m1, m2, m3 hang on the left of the first, second and third pulleys respectively; block m4 hangs at the right end, beside the third pulley.
  1. (1)4a1+2a2+a3+a4=04a_1+ 2a_2+ a_3 + a_4 = 0Official answer
  2. (2)a1+4a2+3a3+a4=0a_1+ 4a_2+ 3a_3 + a_4 = 0
  3. (3)a1+4a2+3a3+2a4=0a_1+ 4a_2+ 3a_3 + 2a_4 = 0
  4. (4)2a1+2a2+3a3+a4=02a_1+ 2a_2+ 3a_3 + a_4 = 0

Official answer

Option 1

NTA final key.

Chapter
Laws of Motion
Topic
Newton's Laws of Motion
Idea tested
Constrained Motion

Same idea in other shifts

Asked 3× in all
  1. 26 Jul 2022, Shift 1 · Q31Three masses M=100M = 100 kg, m1=10m_1 = 10 kg and m2=20m_2 = 20 kg are arranged in a system as shown in figure. All the surfaces are frictionless…HardSingle correctHas a figure
  2. 27 Aug 2021, Shift 2 · Q5The boxes of masses 2 kg and 8 kg are connected by a massless string passing over smooth pulleys. Calculate the time taken by box of mass…HardDiagram 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.