JEE Main 2021PhysicsMotion In Two DimensionsMediumMCQ

JEE Main 2021 — Motion In Two Dimensions Question with Solution

JEE Main 2021 (20 Jul Shift 1)

Question

A butterfly is flying with a velocity 42 m s-1 in north-east direction. Wind is slowly blowing at 1 m s-1 from north to south. The resultant displacement of the butterfly in 3 seconds is:

Choose an option

Show full solutionCorrect option: D
Correct answer
D15 m

Step-by-step explanation

V→BW=42cos45i^+42sin45j^
=4i^+4j^
V→w=-j^
V→B=V→BW+V→w=4i^+3j^
S→B=V→B×t=(4i^+3j^)×3=12i^+9j^
S→B=(12)2+(9)2=15 m

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About this question

This is a previous-year question from JEE Main 2021, covering the Motion In Two Dimensions 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.