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Friday, 9 October

JEE Main 2023 · PhysicsMultiple choiceSingle correctMediumMulti-step

JEE Main 8 April 2023, Shift 2, Physics Q40

Question 40 of 90 in this shift, Physics question 10 of 30, Section A.

A bullet of mass 0.1 kg moving horizontally with speed 400 ms−1^{-1} hits a wooden block of mass 3.9 kg kept on a horizontal rough surface. The bullet gets embedded into the block and moves 20 m before coming to rest. The coefficient of friction between the block and the surface is ______. (Given g=10g = 10 m/s2^2)
  1. (1)0.25Official answer
  2. (2)0.50
  3. (3)0.65
  4. (4)0.90

Official answer

Option 1

NTA final key.

Chapter
Work, Energy and Power
Topic
Collisions
Idea tested
Inelastic Collisions

Same idea in other shifts

Asked 2× in all
  1. 9 Jan 2020, Shift 2 · Q4A particle of mass mm is projected with a speed uu from the ground at an angle θ=π3\theta = \frac{\pi}{3} w.r.t. horizontal (xx-axis).…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.