Strength of Materials
The center of gravity of a triangle lies at the point of

Intersection of bisector of angles
Concurrence of the medians
Intersection of its altitudes
Intersection of diagonals

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Strength of Materials
In actual machines

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

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Strength of Materials
In ideal machines

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

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Strength of Materials
Kinetic friction is the

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

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