JEE Main 2019PhysicsMotion In One DimensionMediumMCQ

JEE Main 2019 — Motion In One Dimension Question with Solution

JEE Main 2019 (10 Apr Shift 2)

Question

A bullet of mass  20 g has an initial speed of  1 m s-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: A
Correct answer
A0.7 m s-1

Step-by-step explanation

a=-2.5×10-220×10-3=-54 m s-2
From v2-u2=2as
v2=u2+2as
v=12-2×54×20×10-2
=0.5
=0.7 m s-1

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About this question

This is a previous-year question from JEE Main 2019, covering the Motion In One Dimension 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.