Physics · Motion in one Dimension

JEE Main 2024 — 6 April, Shift 2 — Question 53

A particle moves in a straight line so that its displacement xx at any time tt is given by x2=1+t2x^{2}=1+t^{2}. Its acceleration at any time t is x−n\mathrm{x}^{-\mathrm{n}} where n=\mathrm{n}= \qquad .

Answer: 3

Numerical answer — enter this value.

Step-by-step solution

x2=1+t2\mathrm{x}^{2}=1+\mathrm{t}^{2}

2xdxdt=2t2 \mathrm{x} \frac{\mathrm{dx}}{\mathrm{dt}}=2 \mathrm{t} xv=t\mathrm{xv}=\mathrm{t} xdvdt+vdxdt=1x \frac{d v}{d t}+v \frac{d x}{d t}=1 x⋅a+v2=1x \cdot a+v^{2}=1

a=1−v2x=1−t2/x2x\mathrm{a}=\frac{1-\mathrm{v}^{2}}{\mathrm{x}}=\frac{1-\mathrm{t}^{2} / \mathrm{x}^{2}}{\mathrm{x}}

a=1x3=x−3\mathrm{a}=\frac{1}{\mathrm{x}^{3}}=\mathrm{x}^{-3}

Answer key and solution verified before publishing.

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Exam
JEE Main 2024
Subject
Physics
Chapter
Motion in one Dimension
Topic
Non-Uniformly Accelerated Motion
A particle moves in a straight line so that its displacement x at any… | JEE Main 2024 PYQ with Solution · DhiX AI