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Friday, 9 October

JEE Main 2021 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 18 March 2021, Shift 1, Physics Q30

Question 30 of 90 in this shift, Physics question 30 of 30, Section B.

A bullet of mass 0.1 kg is fired on a wooden block to pierce through it, but it stops after moving a distance of 50 cm into it. If the velocity of bullet before hitting the wood is 10 m/s and it slows down with uniform deceleration, then the magnitude of effective retarding force on the bullet is 'xx' N. The value of 'xx' to the nearest integer is __________.

Official answer

10

NTA final key.

Same idea in other shifts

Asked 2× in all
  1. 6 Apr 2026, Shift 1 · Q28The rain drop of mass 1 g, starts with zero velocity from a height of 1 km. It hits the ground with a speed of 5 m/s. The work done by the…EasySingle 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.