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Work Done as Dot Product

A rod AB of m...

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A rod AB of mass 10kg and length 4m rests on a horizontal floor with end A fixed so as to rotate it in vertical plane about perpendicular axis passing through A. If the work done on the rod is 100J, the height to which the end B be raised vertically above the floor is [Kerala PET 2007] (a) 1.5 m (c) 1.0 m (b) 2.0 m (d) 2.5 m

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