Block A of mass 3 kg is placed on anothe...

Block A of mass 3 kg is placed on another block B of mass 5 kg placed on the smooth surface. If coefficient of friction between two blocks is `1/2` and 32 N force is applied on block B as shown in the figure, then the work done by the frictional force on block A in first two second will be (initial velocity of the system is zero and `g = 10 m/s^2`)

`+96 J`

`50 J`

`-96 J`

`-50 J`

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