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A uniform cube of side a and mass m rests on a rough horizontal table. A horizontal force 'F' is applied normal to one of the faces at a point that is directly above the centre of the face, at a height 3a 4 above the base. The minimum value of 'F' for which the cube begins to tilt about the edge is ..........(assume that the cube does not slide).

1. 2 mg 3
2. 4 mg 3
3. 5 mg 4
4. 1 mg 2

Correct answer: 2 mg 3

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