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

1.5 cm
0.5 cm
2.5 cm
1.0 cm

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Strength of Materials
Limiting force of friction is the

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
the friction force acting when the body is in motion
Ratio of limiting friction and normal reaction

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Strength of Materials
According to principle of moments

positive and negative couples can be balanced
the algebraic sum of the moments of any two forces about any point is equal to moment of theiwesultant about the same point
if a system of coplanar forces is in equilibrium, then their algebraic sum is zero
if a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero

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