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__________________?

Related Mcqs:

1. Two coplanar couples having equal and opposite 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

2. The product of either force of couple with the arm of the couple is called_________________?

   A. resultant couple
   B. moment of the forces
   C. resulting couple
   D. moment of the couple
   E. none of the above

3. 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

4. The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is as per the principle of__________________?

   A. forces
   B. independence of forces
   C. dependence of forces
   D. balance of force
   E. resolution of forces

5. 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

6. 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

7. 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

8. 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

9. 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

10. The unit of force in S.I. units is________________?

    A. kilogram
    B. newton
    C. watt
    D. dyne
    E. joule