JEE Main 2019PhysicsMotion In One DimensionHardMCQ

JEE Main 2019 — Motion In One Dimension Question with Solution

JEE Main 2019 (12 Apr Shift 2)

Question

A particle is moving with speed v=bx along positive x- axis. Calculate the speed of the particle at time t=τ (assume that the particle is at origin at t=0 )

Choose an option

Show full solutionCorrect option: C
Correct answer
Cb2τ2

Step-by-step explanation

v=bx … (1)
⇒dxdt=bx
dxx=bdt
∫0xdxx=∫0tbdt
2x=bt … (2)
From equation (1) and (2)
v=bbt2       
∴at t=τ 
v=b2τ2

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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.