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# Electrostatic force on a charged particle is given by If q is positive and if q negative

Question : In the figure Block A is neutral while Sizes of A and B are negligible. B is released from rest at a distance 1.8 m from A. Initially spring is neither compressed nor elongated

If collision between A and B is perfectly inelastic, what is velocity of combined mass just after collision ?

- 6 m/s
- 3 m/s
- 9 m/s
- 12 m/s

## The correct answer is: 3 m/s

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