71. A system of copianar forces acting on a rigid body can be reduced to________________?
A. one force only
B. one couple only
C. one force and one couple only
D. none of the above
✅ The correct answer is option C.
Applied Mechanics and Graphic Statics MCQs
72. The maximum displacement of a particle executing S.H.M. corresponds to__________________?
A. zero potential energy and maximum kinetic energy
B. zero kinetic energy and maximum potential energy
C. maximum kinetic energy and maxi-mum potential energy
D. minimum kinetic energy and minimum potential energy
✅ The correct answer is option B.
73. The maximum value of the horizontal range for a projectile projected with a velocity of 98 m/sec is__________________?
A. 98 m
B. 490 m
C. 980 m
D. 1960 m
✅ The correct answer is option C.
74. A particle moves in a straight line and its position is defined by the equation x = 6 t2 – t3 where t is expressed in seconds and x in meters. The maximum velocity during the motion is_________________?
A. 6 m/sec
B. 12 m/sec
C. 24 m/sec
D. 48 m/sec
✅ The correct answer is option B.
75. A particle is executing simple harmonic motion in a line 1.0 m long. If the time of one complete vibration is 1 sec, then the maximum velocity of the particle is___________________?
A. 1.00 m/sec
B. 1.57 m/sec
C. 3.14 m/sec
D. 6.28 m/sec
✅ The correct answer is option C.
76. 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
✅ The correct answer is option B.
77. The diagram showing the point of application and line of action of forces in their plane is called____________________?
A. vector diagram
B. space diagram
C. force diagram
D. funicular diagram
✅ The correct answer is option B.
78. The condition of equilibrium for any system of forces in a plane is____________________?
A. that polygon of forces must close
B. that resultant couple must be zero
C. both (A) and (B)
D. none of the above
✅ The correct answer is option C.
79. The shape of a suspended cable for a uniformly distributed load over it is__________________?
A. circular
B. parabolic
C. catenary
D. cubic parabola
✅ The correct answer is option B.
80. A particle of mass 2 kg executes simple harmonic motion of frequency 6/71 Hz and amplitude 0.25 m. Its maximum kinetic energy is___________________?
A. 4.5 J
B. 9.0 J
C. 12.0 J
D. 18.0 J
✅ The correct answer is option B.