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A small block of mass m rests on the sloping side of a triangular block of mass M which itself rests on a horizontal table as shown in the figure (Figure 1).

Assuming all surfaces are frictionless, decide the magnitude of the force F? That should be applied to M so that m remains in a fixed position relative to M (that is, m doesn't move on the incline). [Hint: Take x and y axes horizontal and vertical.]

Express your answer in terms of the given quantities and appropriate constants.

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