A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span________________?

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 heavy string attached at two ends at same horizontal level and when central dip is very small approaches the following curve___________________?

   A. catenary
   B. parabola
   C. hyperbola
   D. elliptical
   E. circular arc

3. A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal________________?

   A. density of metal can’t be determined
   B. metal is twice as dense as water
   C. metal will float in water
   D. metal is twice as dense as unknown fluid
   E. none of the above

4. The centre 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 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

6. The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is_________________?

   A. same
   B. double
   C. half
   D. four times
   E. one fourth

7. 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__________________?

   A. friction
   B. limiting friction
   C. repose
   D. kinematic friction
   E. static friction

8. 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°

9. The center of percussion of the homogeneous rod of length L suspended at the top will be__________________?

   A. L/2
   B. L/3
   C. 3L/4
   D. 2L/3
   E. 3L/8

10. 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