Related Mcqs:

1. The resultant of the following three couples 20 kg force, 0.5 m arm, $ ve sense 30 kg force, 1 m arm, – ve sense 40 kg force, 0.25 m arm, + ve sense having arm of 0.5 m will be__________________?

   A. 20 kg, – ve sense
   B. 20 kg, + ve sense
   C. 10 kg, + ve sense
   D. 10 kg, – ve sense
   E. 45 kg, + ve sense

2. 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

3. 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

4. A semi-circular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi-cricular disc and horizontal surface is \i. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will____________________?

   A. remain horizontal
   B. slant up towards direction of pull
   C. slant down towards direction of pull
   D. unpredictable
   E. none of the above

5. Friction force for dry surfaces. Friction force is________________?

   Pick up wrong statement?
   A. proportional to normal load between the surfaces
   B. dependent on the materials of contact surface
   C. proportional to velocity of sliding
   D. independent of the area of contact surfaces
   E. none of the above is wrong statement

6. 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

7. Effect of a force on a body depends upon ________________?

   A. magnitude
   B. direction
   C. position or line of action
   D. all of the above
   E. none of the above

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. Limiting force of friction is the__________________?

   A. tangent of angle between normal-reaction and the resultant of normal reaction and limiting friction
   B. ratio of limiting friction and normal reaction
   C. the friction force acting when the body is just about to move
   D. the friction force acting when the body is in motion
   E. minimum force of friction

10. In the equation of virtual work, following force is neglected_______________________?

    A. reaction of any smooth surface with which the body is in contact
    B. reaction of a rough surface of a body which rolls on it without slipping
    C. reaction at a point or an axis, fixed in space, around which a body is con-strained to turn
    D. all of the above
    E. none of the above