According to the law of moments, if a number of coplanar forces acting on a particle are in equilibrium, then

A Their algebraic sum is zero
B Their lines of action are at equal distances
C The algebraic sum of their moments about any point in their plane is zero
D The algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point

Correct Answer: The algebraic sum of their moments about any point in their plane is zero

Bissoy MCQ
#Mechanical Engineering #Engineering Mechanics

Related Questions

If a number of coplanar forces acting at a point be in equilibrium, the sum of clockwise moments must be __________ the sum of anticlockwise moments, about any point.
A Equal to
B Less than
C Greater than
D None of these
Varingon's theorem of moments states that if a number of coplanar forces acting on a particle are in equilibrium, then
A Their algebraic sum is zero
B Their lines of action are at equal distances
C The algebraic sum of their moments about any point in their plane is zero
D The algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point
Three forces which act on a rigid body to keep it in equilibrium. The forces must be coplanar and
A Concurrent
B Parallel
C Concurrent parallel
D None of these
Forces are called coplanar when all of them acting on body lie in
A One point
B One plane
C Different planes
D Perpendicular planes
A system of coplanar forces acting on a rigid body can be reduced to
A One force only
B One couple only
C One force and one couple only
D None of the above
Two coplanar couples having equal and opposite moments
A Balance each other
B Produce a couple and an unbalanced force
C Are equivalent
D Cannot balance each other
Parallelogram Law of Forces states, "if two forces acting simultaneously on a particle be represented in magnitude and direction by two adjacent sides of a parallelogram, their resultant may be represented in magnitude and direction by
A Its longer side
B Its shorter side
C The diagonal of the parallelogram which does not pass through the point of intersection of the forces
D The diagonal of the parallelogram which passes through the point of intersection of the forces
Non-coplanar concurrent forces are those forces which
A Meet at one point, but their lines of action do not lie on the same plane
B Do not meet at one point and their lines of action do not lie on the same plane
C Meet at one point and their lines of action also lie on the same plane
D Do not meet at one point, but their lines of action lie on the same plane
Coplanar concurrent forces are those forces which
A Meet at one point, but their lines of action do not lie on the same plane
B Do not meet at one point and their lines of action do not lie on the same plane
C Meet at one point and their lines of action also lie on the same plane
D Do not meet at one point, but their lines of action lie on the same plane
Non-coplanar non-concurrent forces are those forces which
A Meet at one point, but their lines of action do not lie on the same plane
B Do not meet at one point and their lines of action do not lie on the same plane
C Do not meet at one point but their lines of action lie on the same plane
D None of the above

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