Strength of Materials
The center of gravity of a uniform lamina lies at

the bottom surface
All of these
the mid point of its axis
the center of heavy portion

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Strength of Materials
According to principle of moments

the algebraic sum of the moments of any two forces about any point is equal to moment of theiwesultant about the same point
if a system of coplanar forces is in equilibrium, then their algebraic sum is zero
if a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero
positive and negative couples can be balanced

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Strength of Materials
Center of percussion is

the point of metacentre
point of suspension
the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
the point of C.G.

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