A body of mass 2 kg slides down with anacceleration of 3 on a rough inclined plane having a slope of . The external force required to take the same body up the plane with the same acceleration will be : (g=10 )
14N
20N
6N
4N
As we have learnt
Retardation of block sliding up over a rough Inclined plane -
- wherein
For
To move body up with same accelaration
Option 1)
14N
Option 2)
20N
Option 3)
6N
Option 4)
4N
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