JEE Advanced 2014 Paper 1 Physics Q18

Physics · Kinematics

Problem

A rocket is moving in a gravity free space with a constant acceleration of

2\,\mathrm{m\,s^{-2}}

along

+x

direction (see figure). The length of a chamber inside the rocket is

4\,\mathrm{m}

. A ball is thrown from the left end of the chamber in

+x

direction with a speed of

0.3\,\mathrm{m\,s^{-1}}

relative to the rocket. At the same time, another ball is thrown in

-x

direction with a speed of

0.2\,\mathrm{m\,s^{-1}}

from its right end relative to the rocket. The time in seconds when the two balls hit each other is