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Friday, 9 October

JEE Main 2026 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 6 April 2026, Shift 1, Physics Q33

Question 33 of 75 in this shift, Physics question 8 of 25, Section A.

The position of center of mass of three masses 2 kg, 3 kg and 15 kg placed with respect to mid point (pp) of normal bisector, as shown in the figure is ________.

The figure, in words

Isosceles triangle: 2 kg mass at left base vertex, 3 kg at right base vertex, 15 kg at the apex; equal sides 10 m each, apex angle 120 degrees; P is the midpoint of the base (foot of the normal bisector from the apex).
  1. (1)(34,1.25)\left(\frac{\sqrt{3}}{4},1.25\right)Official answer
  2. (2)(34,1.0)\left(\frac{\sqrt{3}}{4},1.0\right)
  3. (3)(0,0)(0,0)
  4. (4)(1.25,0)(1.25,0)

Official answer

Option 1

NTA final key.

Chapter
System of Particles and Rotational Motion
Topic
Center of Mass
Idea tested
Discrete System COM

Same topic in other shifts

All Center of Mass questions
  1. 2 Apr 2026, Shift 2 · Q28Two blocks of masses 2 kg and 1 kg respectively, are tied to the ends of a string which passes over a light frictionless pulley as shown…MediumSingle correctHas a figure
  2. 6 Apr 2026, Shift 2 · Q32Two identical bodies A and B of equal masses have initial velocities v⃗1=4i^\vec{v}_1=4\hat{i} m/s and v⃗2=4j^\vec{v}_2=4\hat{j} m/s respectively.…MediumSingle correct
  3. 7 Apr 2025, Shift 1 · Q29A rod of length 5 L is bent right angle keeping one side length as 2 L. The position of the centre of mass of the system: (Consider L = 10…EasySingle correctHas a figure
  4. 8 Apr 2024, Shift 1 · Q52A uniform thin metal plate of mass 10 kg with dimensions is shown. The ratio of xx and yy coordinates of center of mass of plate in…MediumNumerical valueHas a figure
  5. 25 Jul 2021, Shift 1 · Q21A body of mass 2 kg moving with a speed of 4 m/s. makes an elastic collision with another body at rest and continues to move in the…MediumNumerical value
  6. 8 Jan 2020, Shift 1 · Q3The coordinates of centre of mass of a uniform flag shaped lamina (thin flat plate) of mass 4 kg. (The coordinates of the same are shown…EasySingle correctHas 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 42 of the 174 JEE Main shifts held from 2017 to 2026.