According to law of triangle of forces __________________ ?

Related Mcqs:

1. If three forces acting in different planes can be represented by a triangle, these will be in________________?

   A. non-equilibrium
   B. partial equilibrium
   C. full equilibrium
   D. unpredictable
   E. none of the above

2. The center of gravity of a triangle lies at the point of __________________?

   A. concurrence of the medians
   B. intersection of its altitudes
   C. intersection of bisector of angles
   D. intersection of diagonals
   E. all of the above

3. 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
   E. different points

4. Which is the correct statement about law of polygon of forces ?

   A. if any number of forces acting at a point can be represented by the sides
   of a polygon taken in order, then the forces are in equilibrium
   B. if any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium
   C. if a polygon representing forces acting at a point is closed then forces are in equilibrium
   D. if any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium
   E. none of the above.

5. According to principle of transmissibility of forces, the effect of a force upon a body is_________________?

   A. maximum when it acts at the center of gravity of a body
   B. different at different points in its line of action
   C. the same at every point in its line of action
   D. minimum when it acts at the C.G. of the body
   E. none of the above

6. If two equal forces of magnitude P act at an angle 9°, their resultant will be________________?

   A. P/2 cos 9/2
   B. IP sin 9/2
   C. 2P tan 9/2
   D. IP cos 9/2
   E. Psin 9/2

7. Forces are called concurrent when their lines of action meet in________________?

   A. one point
   B. two points
   C. plane
   D. perpendicular planes
   E. different planes

8. If a number of forces act simultaneously on a particle, it is possible _____________________?

   A. not a replace them by a single force
   B. to replace them by a single force
   C. to replace them by a single force through C.G.
   D. to replace them by a couple
   E. to replace them by a couple and a force

9. The algebraic sum of moments of the forces forming couple about any point in their plane is_________________?

   A. equal to the moment of the couple
   B. constant
   C. both of above are correct
   D. both of above are wrong
   E. none of the above

10. If a rigid body is in equilibrium under the action of three forces, then _____________________?

    A. these forces are equal
    B. the lines of action of these forces meet in a point
    C. the lines of action of these forces are parallel
    D. B. and C. above
    E. none of the above