A force acting on a body may_______________?

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. 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

3. 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

4. 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

5. 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

6. 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

7. Pick up wrong statement about friction force for dry surfaces. Friction force is________________?

   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

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 body of weight W on inclined plane of a being pulled up by a horizontal force P will be on the point of motion up the plane when P is equal to___________________?

   A. W
   B. W sin (a + $)
   C. Wtan(a + <|))
   D. Wan(a-)
   E. Wtana

10. The maximum frictional force which comes into play when a body just begins to slide over another surface is called_____________________?

    A. limiting friction
    B. sliding friction
    C. rolling friction
    D. kinematic friction
    E. dynamic friction