The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of_______________?

Related Mcqs:

1. 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...

2. 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. W\an(a-) E. Wtana...

3. Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction___________________?

   A. along the plane B. horizontally C. vertically D. at an angle equal to the angle of friction to the inclined plane E. unpredictable...

4. The center of percussion of a solid cylinder of radius r resting on a horizontal plane will be_________________?

   A. r/2 B. 2r/3 C. r/A D. 3r/2 E. 3r/A...

5. A projectile is fired at an angle 9 to the vertical. Its horizontal range will be maximum when 9 is_______________?

   A. 0° B. 30° C. 45° D. 60° E. 90°....

6. The effort required to lift a load W on a screw jack with helix angle a and angle of friction <j) is equal to _________________?

   A. Wtan(a + ) B. Wtan(a-) C. Wcos(a + ) D. Wsin(a + ) E. W (sin a + cos )....

7. 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...

8. 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...

9. The C.G. of a plane lamina will not be at its geometrical centre in the case of a__________________?

   A. right angled triangle B. equilateral triangle C. square D. circle E. rectangle...

10. 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...