The angles between two forces to make their resultant a minimum and a maximum respectively are__________________?

Related Mcqs:

1. The resultant of two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then_________________?

   A. P = R
   B. Q = R
   C. P = Q
   D. None of the above is correct

2. If the resultant of two forces has the same magnitude as either of the force, then the angle between the two forces is____________________?

   A. 30°
   B. 45°
   C. 60°
   D. 120°

3. 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

4. When two forces, each equal to P, act at 90° to each other, then the resultant will be_____________?

   A. P
   B. PV2
   C. P/V2
   D. 2P

5. The number of funicular polygons which can be drawn to pass through two specified points in the space diagram are__________________?

   A. zero
   B. 1
   C. 2
   D. infinity

6. The dimensions of centrifugal force are__________________?

   A. M1 L2 T2
   B. M’L’T1
   C. M’L’T2
   D. M’L-‘T2

7. Two balls of masses 3 kg and 6 kg are moving with velocities of 4 m/sec and 1 m/sec respectively, towards each other along the line of their centers. After impact the 3 kg ball comes to rest. This can happen only if the coefficient of restitution between the balls is____________________?

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

8. A ladder of weight ‘w’ rests against a smooth vertical wall, and rests on rough horizontal ground, the coefficient of friction between the ladder and the ground being 1/4. The maximum angle of inclination of the ladder to the vertical, if a man of weight ‘w’ is to walk to the top of it safely, is tan’1 x, where x is___________________?

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

9. In which of the following trusses, the method of substitution is required for determining the forces in all the members of the truss by graphic statics ?

   A. howe truss
   B. king post truss
   C. fink truss
   D. warren truss

10. The graphical method of determining the forces in the members of a truss is based on________________?

    A. method of joint
    B. method of section
    C. either method
    D. none of the two methods