Applied Mechanics and Graphic Statics
Force polygon method is applicable for

Non-concurrent coplanar force system
A system of parallel forces only
Any coplanar force system
Concurrent coplanar force system

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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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Applied Mechanics and Graphic Statics
Periodic time of body moving with simple harmonic motion, is

Inversely proportional to its angular velocity
Directly proportional to the square of its angular velocity
Directly proportional to its angular velocity
Inversely proportional to the square of its angular velocity

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