1011. A system of three forces acts on a body and keeps it in equilibrium .The forces need to be :

A. Coplanar only
B. Concurrent only
C. Coplanar as we well as concurrent *
D. Coplanar yet could conceivably be simultaneous

1012. Which of the followings is not essential for the three vectors to produce zero resultant ?

A. They ought to be lying on the same plane.
B. The third vector should have an equal and opposite resultant from any two vectors.
C. The vectors should be able to be represented by the three sides of an ordered triangle.
D. The vectors ought to operate along the parallelogram’s sides *

1013. Which of the following pair of concurrent forces cannot have a resultant of 4 N?

A. 2 N and 2 N
B. 2 N and 4 N
C. 2 N and 6 N
D. 2 N and 8 N *

1014. A body is acted upon by the following sets of three concurrent forces .Which set cannot have a zero resultant ?

A. 10, 10 and 10 units
B. 10, 10 and 20 units
C. 10, 20 and 20 units
D. 10, 20 and 40 units *

1015. The angle between the forces is: the result of two forces of equal magnitude is the same for either of them.

A. 0 Degree
B. 60 Degree
C. 90 Degree
D. 120 Degree *

1016. A body of weight of 10 N is suspended by a string 10 cm long and is held at a point 6 cm from the vertical line passing through the point of suspension by a horizontal force. The horizontal force is :

A. 7.5 N *
B. 10.2 N
C. 16.7 N
D. 13.6 N

1017. At a height of 12 meters above the ground, a uniform ladder weighing 80 N rests against a smooth vertical wall; 10 meters away from the wall is where the ladder’s foot is. The following is the wall’s pressure:

A. 22.7 N
B. 33.3 N *
C. 40 N
D. 86.7 N

1018. The middle of a rope has a mass of one kilogram attached to it, and the rope is being pulled in opposite directions from both ends. At g=10m/s2, the minimum pull needed to completely straighten the rope is:

A. 5 N
B. 10 N
C. 25 N
D. Much greater than 25 N *

1019. A string 2 m long is attached to the finishes of a uniform pole that weight 60 N and is 1.6 m long . The string ignores a nail with the goal that the bar hangs upward . The string’s tension is as follows:

A. 24 N
B. 30 N
C. 42 N
D. 50 N *

1020. The following is shown in a body’s free body diagram:

A. With its environmental elements and outer powers following up on it
B. Isolated from all external effects
C. Isolated from its surroundings
D. Isolated from its environment and all external influences *