Applied Mechanics and Graphic Statics
The maximum displacement of a particle executing S.H.M. corresponds to

Maximum kinetic energy and maximum potential energy
Minimum kinetic energy and minimum potential energy
Zero potential energy and maximum kinetic energy
Zero kinetic energy and maximum potential energy

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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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