A block in the shape of a parallelopiped of sides lm x 2m x 3m lies on the surface. Which of the faces gives maximum stable block ?

Related Mcqs:

1. A uniform pyramid and a uniform prism of same height lie with their base on the surface. Which is more stable ?

   A. pyramid
   B. prism
   C. both equally stable
   D. none of the above

2. A rigid body is in a stable equilibrium if the application of any force__________________?

   A. can raise the CG of the body but can not lower it
   B. tends to lower the CG of the body
   C. neither raises nor lowers the CG of the body
   D. none of above

3. When a circular wheel rolls on a straight track, then the shape of body centrode and space centrode respectively are________________?

   A. straight line and parabola
   B. straight line and circle
   C. circle and straight line
   D. circle and parabola

4. The shape of a suspended cable for a uniformly distributed load over it is__________________?

   A. circular
   B. parabolic
   C. catenary
   D. cubic parabola

5. When a body slides down an inclined surface, the acceleration of the body is given by__________________?

   A. g
   B. gsinG
   C. g cos 6
   D. g tan 6

   where ‘g’ is acceleration due to gravity and 9 is the angle of inclination of surface with the horizontal

6. A disc of mass 4 kg, radius 0.5m and moment of inertia 3 kg-m2 rolls on a horizontal surface so that its center moves with speed 5 m/see. Kinetic energy of the disc is ___________________?

   A. 50 J
   B. 150 J
   C. 200 J
   D. 400 J

7. A projectile has maximum range of 40 m on a horizontal plane. If angle of projection is a and the time of flight is 1 second, then sin a must be about__________________?

   A. 1/4
   B. 1/3
   C. 1/2
   D. 1/5

   Assume g = 10 m/sec2

8. The maximum pull in a cable, carrying a uniformly distributed load and supported at two ends which are at the same level, is at_____________________?

   A. supports
   B. quarter span
   C. mid span
   D. none of the above

9. A cable loaded with 10 kN/m of span is stretched between supports in the same horizontal line 100 m apart. If the central dip is 10 m, then the maximum and minimum pull in the cable respectively are____________________?

   A. 1346.3 kN and 1500 kN
   B. 1436.2 kN and 1250 kN
   C. 1346.3 kN and 1250 kN
   D. 1436.2 kN and 1500 kN

10. The angle of projection at which the horizontal range and maximum height of a projectile are equal to___________________?

    A. 45°
    B. tan-1 (2)
    C. tan-‘ (4)
    D. tan”1 (1/4)