A body consists of numerous particles on which the pull of the earth, i.e. the forces of gravity act. The resultant of these forces acts through point. This point is called the ________ of the body.
a) centroid
b) neutral axis
c) centre of gravity
d) gravity
Q.2.
When an area is symmetrical about both its axes, the centre of gravity will be at the __________ of these axes.
a) linear point
b) different point
c) collinear point
d) point of intersection
Q.3.
For locating the position of the centre of gravity of an area of unsymmetrical shape, it is first divided into a number of ______________ of symmetrical shapes.
a) smaller areas
b) larger areas
c) identical areas
d) same areas
Q.4.
The sum of the products of the area of its elements and the squares of the perpendicular distances of the centres of gravity of these elements from the axis is called ___________
a) centrifugal force
b) moment of inertia of areas
c) centripetal force
d) centre of gravity
Q.5.
The moment of inertia is graphically determined by ___________ with the help of space diagrams, polar diagram, force diagram and funicular polygons.
c) continuity method
d) coloumb method
a) culmann’s method
b) calibration method
Q.6.
The unit of moment of inertia will be in ______
a) Length*distance2
b) Area2*length
c) Area*distance3
d) kilogram metre squared
Q.7.
In case of an area, the figure is assumed to be a lamina of negligible thickness so that its centre of gravity will be practically on the surface. As the area has no weight this point is also called the ______
a) Moment of inertia of areas
b) Centre of gravity
c) Centroid
d) Neutral axis
Q.8.
The density of a certain rod a foot long varies directly as the square of the distance from one end. Find the centre of gravity.
a) 4/3a
b) 3/4a
c) 1/3a
d) 1/4a
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