Strength of Materials
Center of percussion is

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.
the point of metacentre

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Strength of Materials
The weight of a body is due to

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

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Strength of Materials
Which one of the following statements is not correct

the tangent of the angle of friction is equal to coefficient of friction
the angle of repose is equal to angle of friction
the sine of the angle of repose is equal to coefficient to friction
the tangent of the angle of repose is equal to coefficient of friction

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