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A rocket is moving in a gravity free spa...

A rocket is moving in a gravity free space with a constant acceleration of `2 ms^(-2)` along +x direction (see figure). The length of a chamber inside the rocket is 4 m. A ball is thrown from the left end of the chamber in +x direction with a speed of `0.3 ms^(-1)` from its right end relative to the rocket. The time in seconds when the two balls hit each other is

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