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A block B of mass 10 kg is placed on smo...

A block `B` of mass `10 kg` is placed on smooth horizontal surface over it another block `A` of same mass is placed. `A` horizontal force `F` is applied on block `B`. `S_(1)` : No block will move unless `F gt 10 N`.
`S_(2)` : Block A will move towards left.
`S_(3)` : Acceleration of block B will never be less than that of `A`.
`S_(4)` : The relative motion between `A` and `B` will start when `F` exceeds `10 N`.

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