Applied Mechanics and Graphic Statics
Centre of gravity of a thin hollow cone lies on the axis of symmetry at a height of

One-half of the total height above base
None of these
One-third of the total height above base
One-fourth of the total height above base

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Applied Mechanics and Graphic Statics
Free body diagram is an

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

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Applied Mechanics and Graphic Statics
Lami's theorem states that

Three coplanar forces acting at a point will be in equilibrium if each force is inversely proportional to the sine of the angle between the other two
Three coplanar forces acting at a point will be in equilibrium, if each force is proportional to the sine of the angle between the other two
If three forces acting on a point can be represented in magnitude and direction by the sides of a triangle, the point will be in the state of equilibrium
Three forces acting at a point are always in equilibrium

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