Strength of Materials
The weight of a body is due to

centripetal force of earth
gravitational force of attraction towards the centre of the earth.
force of attraction experienced by par-ticles
gravitational pull exerted by the earth

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Strength of Materials
Center of percussion is

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

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