JEE Main 2021 — Laws Of Motion Question with Solution
From: JEE Main 2021 (Online) 18th March Morning Shift
Question
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 'x' N. The value of 'x' to the nearest integer is __________.
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Show full solutionCorrect answer: 10
Correct answer
10
Step-by-step explanation
Mbullet = 0.1 kg
V2 = 44 + 2(a) 5
0 = (10)2 2a (0.5)
Retardation = 100 m/s2
Retarding force (F) = ma = 0.1 100
FR = 10 N
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This is a previous-year question from JEE Main 2021, covering the Laws Of Motion chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.