Strength of Materials
From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the center of circular plate

0.5 cm
2.5 cm
1.0 cm
1.5 cm

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Strength of Materials
Limiting force of friction is the

the friction force acting when the body is in motion
Ratio of limiting friction and normal reaction
Tangent of angle between normal reaction and the resultant of normal reaction and limiting friction
The friction force acting when the body is just about to move

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Strength of Materials
A semi-circular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi-cricular disc and horizontal surface is i. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will

slant up towards direction of pull
remain horizontal
slant down towards direction of pull
unpredictable

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