Strength of Materials
Frictional force encountered after commencement of motion is called

limiting friction
post friction
frictional resistance
dynamic friction

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Strength of Materials
If a rigid body is in equilibrium under the action of three forces, then

the lines of action of these forces are parallel
these forces are equal
the lines of action of these forces meet in a point & the lines of action of these forces are parallel
the lines of action of these forces meet in a point

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

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

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