Forces are called coplanar when all of them acting on body lie in________________?

Related Mcqs:

1. The magnitude of two forces, which when acting at right angle produce resultant force of VlOkg and when acting at 60° produce resultant of Vl3 kg. These forces are____________________?

   A. 2 and V6
   B. 3 and 1 kg
   C. V5andV5
   D. 2 and 5
   E. none of the above

2. 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

3. If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either__________________?

   A. meet in a point
   B. be all parallel
   C. at least two of them must meet
   D. all the above are correct
   E. none of the above

4. Two coplanar couples having equal and op-posite moments_________________?

   A. balance each other
   B. produce a couple and an unbalanced force
   C. are equivalent
   D. produce a moment of couple
   E. can not balance each other

5. The forces, which meet at one point, but their lines of action do not lie in a plane, are called______________?

   A. coplanar non-concurrent forces
   B. non-coplanar concurrent forces
   C. non-coplanar non-concurrent forces
   D. intersecting forces
   E. none of the above

6. A number of forces acting at a point will be in equilibrium if_________________?

   A. their total sum is zero
   B. two resolved parts in two directions at right angles are equal
   C. sum of resolved parts in any two per-pendicular directions are both zero
   D. all of them are inclined equally
   E. none of the above

7. Two non-collinear parallel equal forces acting in opposite direction________________?

   A. balance each other
   B. constitute a moment
   C. constitute a couple
   D. constitute a moment of couple
   E. constitute a resultant couple

8. A force acting on a body may_______________?

   A. introduce internal stresses
   B. balance the other forces acting on it
   C. retard its motion
   D. change its motion
   E. all of the above

9. 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

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