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Two particles A and B of masses 1kg and ...

Two particles `A` and `B` of masses `1kg` and `2kg`, respectively, are kept at a very large separation. When they are released, they move under their gravitational attraction. Find the speed (in `10^(-5) m//s`) of `A` when that of `B` is `3.6 cm//hr`.

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The correct Answer is:
2
Since force and acceleration the are same, they have zero initial velocity, the sepration will be the same, which is `3.0 cm`
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