Related Questions

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
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
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
stand next to the lamppost and face west ,walk 20 yards and then turn 90 degrees clockwise. Walk another 10 yards and then turn 45 degrees anticlockwise. Walk another 15 yards, reverse you direction and walk 5 yards back. Turn 135 degrees clockwise and walk another 10 yards . In which direction are you now facing?
A West
B East
C South
D North
Coplanar non-concurrent forces are those forces which __________ at one point, but their lines of action lie on the same plane.
A Meet
B Do not meet
C Either ‘A’ or ‘B’
D None of these
The forces which meet at one point, but their lines of action __________ on the same plane, are Known as non-coplanar concurrent forces.
A Lie
B Do not lie
C Either A or B
D None of these
For any system of coplanar forces, the condition of equilibrium is that the
A Algebraic sum of the horizontal components of all the forces should be zero
B Algebraic sum of the vertical components of all the forces should be zero
C Algebraic sum of moments of all the forces about any point should be zero
D All of the above
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 circular dials of exactly the same size are mounted on a wall side by side in such a way that their perimeters touch at one point. Dial 1, which is on the left , spins clockwise around its center , and dial 2 , which is on the right spins counter clockwise around its center . (Assume that there is no friction at the point of contact between the dials.) Each dial is marked on its perimeter at three points that are at equale distances around the points arked ondial 1 are N, O, and P and the points marked on dial 2 are X, Y, and Z. If points O and Z are just meeting at the point of contact between the dials , and if dial 1 spins at the same speed as dial 2, what is the smallest number of revolutions of each dial that will bring O and Z together again?
A 1
B 2
C 3
D 4

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