JEE Main 2019 — Laws Of Motion Question with Solution
From: JEE Main 2019 (Online) 10th April Evening Slot
Question
A bullet of mass 20 g has an initial speed of 1 ms–1
, just before it starts penetrating a mud wall of thickness
20 cm. If the wall offers a mean resistance of 2.5 × 10–2 N, the speed of the bullet after emerging from the
other side of the wall is close to :
Choose an option
Show full solutionCorrect option: C
Correct answer
C0.7 ms-1
Step-by-step explanation
Given, resistance offered by the wall
So, deacceleration of bullet,
Now, using the equation of motion,
We have,
So, deacceleration of bullet,
Now, using the equation of motion,
We have,
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This is a previous-year question from JEE Main 2019, 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.