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A body of mass 2 kg slides down with an ...

A body of mass 2 kg slides down with an acceleration of 3 `m//s^(2)` on a rough inclined plane having a slope of `30^(@)` The external force required to take the same body up the plane with the same acceleration will be : `(g=10 m//s^(2))`

A

6 N

B

20 N

C

4 N

D

4 N

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