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Two small balls of the same size and of ...

Two small balls of the same size and of mass `m_(1)` and `m_(2)(m_(1) gt m_(2))` are tied by a thin light thread and dropped from a large height. Determine the tension `T` of the thread during the flight after the motion of the balls has become steady. (Air resistance force is same on two balls)
[Take `m_(1)=2kg`, `m_(2)=1kg`, `g=10m//s^(2)`]

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The correct Answer is:
`(1)/(2)(m_(1)-m_(2))g`
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