Strength of Materials
The weight of a body is due to

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

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Strength of Materials
In ideal machines

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

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Strength of Materials
According to principle of transmissibility of forces, the effect of a force upon a body is

Different at different points in its line of action
The same at every point in its line of action
Minimum when it acts at the C.G. of the body
Maximum when it acts at the center of gravity of a body

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