Related Mcqs:

1. 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

2. 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

3. The necessary condition for forces to be in equilibrium is that these should be_________________?

   A. coplanar
   B. meet at one point ;
   C. both A. and B. above
   D. all be equal
   E. something else

4. 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

5. 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

6. 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

7. 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

8. 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

9. A single force and a couple acting in the same plane upon a rigid body_____________________?

   A. balance each other
   B. cannot balance each other
   C. produce moment of a couple
   D. are equivalent
   E. none of the above

10. According to law of triangle of forces __________________ ?

    A. three forces acting at a point will be in equilibrium
    B. three forces acting at a point can be represented by a triangle, each side being proportional to force
    C. if three forces acting upon a patticle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium
    D. if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two
    E. none of the above