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Friday, 9 October

JEE Main 2023 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 11 April 2023, Shift 1, Physics Q49

Question 49 of 90 in this shift, Physics question 19 of 30, Section A.

An average force of 125 N is applied on a machine gun firing bullets each of mass 10 g at the speed of 250 m/s to keep it in position. The number of bullets fired per second by the machine gun is :
  1. (1)5
  2. (2)100
  3. (3)50Official answer
  4. (4)25

Official answer

Option 3

NTA final key.

Chapter
Laws of Motion
Topic
Newton's Laws of Motion
Idea tested
Momentum Formulation (F = dp/dt)

Same idea in other shifts

Asked 2× in all
  1. 28 Jul 2022, Shift 1 · Q34A balloon has mass of 10 g in air. The air escapes from the balloon at a uniform rate with velocity 4.5 cm/s. If the balloon shrinks in 5…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.