Applied Mechanics and Graphic Statics
Free body diagram is an

Isolated joint with internal forces acting on it
Isolated joint with all the forces, internal as well as external, acting on it
None of these
Isolated joint with only body forces acting on it

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Applied Mechanics and Graphic Statics
A square hole is punched out of a circular lamina, the diagonal of the square being the radius of the circle. If ‘r’ is the radius of the circle, the C.G. of the remainder from the corner of the square on the circumference will be

[r (π - 0.25)]/(π - 0.5)
[r (π - 0.5)]/(π + 0.25)
[r (π + 0.25)]/(π + 0.5)
[r (π + 0.25)]/(π - 0.5)

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