Strength of Materials
The weight of a body is due to

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

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Strength of Materials
In actual machines

mechanical advantage is greater than velocity ratio
mechanical advantage is less than velocity ratio
mechanical advantage is equal to velocity ratio
mechanical advantage is unity

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Strength of Materials
Center of percussion is

the point of C.G.
point of suspension
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

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