Applied Mechanics and Graphic Statics
To double the period of oscillation of a simple pendulum

Its length should be doubled
Its length should be quadrupled
The mass of its bob should be quadrupled
The mass of its bob should be doubled

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

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