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A body having a weight of 60 N rests on a smooth plane inclined at 30 to the horizontal. Determine (a) the horizontal force required

A body having a weight of 60 N rests on a smooth plane inclined at 30 to the horizontal. Determine (a) the horizontal force required to prevent the body from sliding down the plane, (b) the value and direction of the least force required to pull the body up the plane.

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