Engineering Mechanics The center of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius. 3r/4π 3r/ 8 8r/3 4r/ 3π 3r/4π 3r/ 8 8r/3 4r/ 3π ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through center of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.) IP = IG + Ah2 IP = Ah2 / IG IP = IG - Ah2 IP = IG / Ah2 IP = IG + Ah2 IP = Ah2 / IG IP = IG - Ah2 IP = IG / Ah2 ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The resultant of the two forces ‘P’ and ‘Q’ is ‘R’. If ‘Q’ is doubled, the new resultant is perpendicular to ‘P’. Then Q = R P = Q Q = 2R None of the listed here Q = R P = Q Q = 2R None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics Varingon's theorem of moments states that if a number of coplanar forces acting on a particle are in equilibrium, then The algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point Their algebraic sum is zero Their lines of action are at equal distances The algebraic sum of their moments about any point in their plane is zero The algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point Their algebraic sum is zero Their lines of action are at equal distances The algebraic sum of their moments about any point in their plane is zero ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics According to Newton's first law of motion, None of these The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction, in which the force acts To every action, there is always an equal and opposite reaction Everybody continues in its state of rest or of uniform motion, in a straight line, unless it is acted upon by some external force None of these The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction, in which the force acts To every action, there is always an equal and opposite reaction Everybody continues in its state of rest or of uniform motion, in a straight line, unless it is acted upon by some external force ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The friction experienced by a body, when at rest, is known as Limiting friction Coefficient of friction Dynamic friction Static friction Limiting friction Coefficient of friction Dynamic friction Static friction ANSWER DOWNLOAD EXAMIANS APP
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