Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class11  >>  Motion in a Straight Line
0 votes

A man moves along x axis such that velocity $v=\large\frac{1}{x}$. If he is initially at $x=2 m$ find the time when he reaches $x=4m$

\[(a)\;6 sec\quad (b)\;4 sec \quad (c)\;3 sec \quad (d)\;he\;can't\;reach\; x=4m\]

Can you answer this question?

1 Answer

0 votes
We have $v=\large\frac{dx}{dt}$
Therefore $\large\frac{1}{x}=\frac{dx}{dt}$
$\int dt=\int x dx$
$ t= \large \frac{x^2}{2} \bigg|_2^4$
Hence a is the correct answer.


answered Jun 28, 2013 by meena.p
edited Jan 25, 2014 by meena.p

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, AIPMT Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App