JEE Main 2020PhysicsMotion In One DimensionMediumMCQ

JEE Main 2020 — Motion In One Dimension Question with Solution

JEE Main 2020 (06 Sep Shift 2)

Question

When a car is at rest, its driver sees rain drops falling on it vertically. When driving the car with speed v, he sees that rain drops coming at an angle 60∘ from the horizontal. On further increasing the speed of the car to 1+βv, this angle changes to 45∘. The value of β is close to :

Choose an option

Show full solutionCorrect option: D
Correct answer
D0.73

Step-by-step explanation

   

tan=60°=vrgv               ........1

tan45°=vrg(β+1)v            ..........2

3v=(β+1)v

β=3-1=0.732

 

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About this question

This is a previous-year question from JEE Main 2020, 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.