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Friday, 9 October

JEE Main 2025 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 4 April 2025, Shift 2, Physics Q29

Question 29 of 75 in this shift, Physics question 4 of 25, Section A.

An object is kept at rest at a distance of 3R above the earth's surface where R is earth's radius. The minimum speed with which it must be projected so that it does not return to earth is : (Assume M = mass of earth, G = Universal gravitational constant)
  1. (1)2GMR\sqrt{\frac{2GM}{R}}
  2. (2)GMR\sqrt{\frac{GM}{R}}
  3. (3)3GMR\sqrt{\frac{3GM}{R}}
  4. (4)GM2R\sqrt{\frac{GM}{2R}}Official answer

Official answer

Option 4

NTA final key.

Same idea in other shifts

Asked 2× in all
  1. 2 Apr 2026, Shift 2 · Q31If a body of mass 1 kg falls on the earth from infinity, it attains velocity (v) and kinetic energy (k) on reaching the surface of earth.…MediumSingle correct

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.