81. If the angular distance, 0 = 2t3 – 3t2, the angular acceleration at t = 1 sec. is__________________?
A. 1 rad/sec2
B. 4 rad/sec2
C. 6 rad/sec2
D. 12 rad/sec2
✅ The correct answer is option C.
Applied Mechanics and Graphic Statics MCQs
82. 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
✅ The correct answer is option B.
83. A flywheel of moment of inertia 20 kg-m” is acted upon by a tangential force of 5 N at 2 m from its axis, for 3 seconds. The increase in angular velocity in radian persecond is__________________?
A. 1/2
B. 3/2
C. 2
D. 3
✅ The correct answer is option B.
84. An ordinate in a funicular polygon represents__________________?
A. shear force
B. resultant force
C. bending moment
D. equilibrium
✅ The correct answer is option C.
85. 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.
86. 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.
87. Which of the following represents the state of neutral equilibrium ?
A. a cube resting on one edge
B. a smooth cylinder lying on a curved surface
C. a smooth cylinder lying on a convex surface
D. none of the above
✅ The correct answer is option D.
88. A ball moving on a smooth horizontal table hits a rough vertical wall, the coefficient of restitution between ball and wall being 1/3. The ball rebounds at the same angle. The fraction of its kinetic energy lost is___________________?
A. 1/3
B. 2/3
C. 1/9
D. 8/9
✅ The correct answer is option D.
89. 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
✅ The correct answer is option D.
90. A simple pendulum of length 1 has an energy E when its amplitude is A. If its amplitude is increased to 2 A, the energy becomes____________________?
A. E
B. E/2
C. 2E
D. 4E
✅ The correct answer is option D.