121. The ratio of kinetic energy and potential energy of a simple harmonic oscillator, at a displacement equal to half its amplitude is given by__________________?
A. 1:2
B. 1:1
C. 2:1
D. 3:1
✅ The correct answer is option D.
Civil Engineering
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122. Which of the following stone is best suited for construction of piers and abutments of a railway bridge ?
A. granite
B. sand stone
C. lime stone
D. quartzite
✅ The correct answer is option A.
123. The dimensions of centrifugal force are__________________?
A. M1 L2 T2
B. M’L’T1
C. M’L’T2
D. M’L-‘T2
✅ The correct answer is option C.
124. The angles between two forces to make their resultant a minimum and a maximum respectively are__________________?
A. 0° and 90°
B. 180° and 90°
C. 90° and 180°
D. 180° and 0°
✅ The correct answer is option D.
125. If the kinetic energy and potential energy of a simple harmonic oscillator of amplitude A are both equal to half the total energy, then the displacement is equal to_________________?
A. A
B. A/2
C. A/V2
D. AV2
✅ The correct answer is option C.
126. 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°
✅ The correct answer is option D.
127. Free body diagram is an____________________?
A. isolated joint with only body forces acting on it
B. isolated joint with internal forces acting on it
C. isolated joint with all the forces, internal as well as external, acting on it
D. none of the above
✅ The correct answer is option C.
128. A funicular polygon cannot be made to pass through___________________?
A. one specified point
B. two specified points
C. three specified points
D. more than three specified points
✅ The correct answer is option D.
129. The potential energy of a particle falling through a straight shaft drilled through the earth (assumed homogenous and spherical) is proportional to____________________?
A. log r
B. r
C. r2
D. 1/r
✅ The correct answer is option C.
130. A cube on a smooth horizontal surface___________________?
A. cannot be in stable equilibrium
B. cannot be in neutral equilibrium
C. cannot be in unstable equilibrium
D. can be in any of these states
✅ The correct answer is option D.