JEE Main 2019PhysicsMotion In Two DimensionsMediumMCQ

JEE Main 2019 — Motion In Two Dimensions Question with Solution

JEE Main 2019 (09 Apr Shift 1)

Question

The stream of a river is flowing with a speed of 2 km h-1. A swimmer can swim at a speed of 4 km h-1. The direction of the swimmer with respect to the flow of the river, to cross the river straight, is

Choose an option

Show full solutionCorrect option: C
Correct answer
C120°

Step-by-step explanation

To reach the point directly opposite to the starting point, the resultant velocity of swimmer should be as shown in figure.


 
From figure
sin⁡θ=24=12
θ=30°
Angle with flow =90°+30°=120°

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About this question

This is a previous-year question from JEE Main 2019, 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.