Applied mechanics and graphic statics
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Applied mechanics and graphic statics questions with answers

234 multiple-choice questions. Open any question for its answer and explanation.

  1. The angle which an inclined surface makes with the horizontal when a body placed on it is on the point of moving down, is called
  2. The resultant of two forces acting at right angles is $$\sqrt {34} \,$$ kg and acting at 60° is 70 kg. The forces are
  3. A circular disc rotates at n rpm. The angular velocity of a circular ring of same mass and radius as the disc and to have the same angular momentum is
  4. Instantaneous center is at infinity when the angular velocity is
  5. A disc of mass 4 kg, radius 0.5 m and moment of inertia 3 kg.m2 rolls on a horizontal surface so that its center moves with speed 5 m/see. Kinetic energy of the disc is
  6. A cable loaded with 0.5 tonne per horizontal metre span is stretched between supports in the same horizontal line 400 m apart. If central dip is 20 m, the minimum tension in the cable, will be
  7. A simple pendulum of length L has an energy E when its amplitude is
  8. A simple pendulum of length L has an energy E, when its amplitude is
  9. The units of moment of inertia of an area are
  10. 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 per second is
  11. The maximum velocity of a body vibrating with a simple harmonic motion of amplitude 150 mm and frequency 2 vibrations/sec, is
  12. A ball moving on a smooth horizontal table hits a rough vertical wall, the coefficient of restitution between ball and wall being $$\frac{1}{3}$$. The ball rebounds at the same angle. The fraction of its kinetic energy lost is
  13. For a self-locking machine, the efficiency should be
  14. The condilion for a lifting machine to be reversible is that its efficiency should be
  15. Coefficient of friction depends on
  16. The ratio of the speed of a rolling cylinder to the speed of sliding cylinder is
  17. A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The mechanical advantage of the lifting machine is
  18. A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The velocity ratio of the lifting machine is
  19. A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The efficiency of the lifting machine is A. 50 % B. 40 % C. 55 % D. 30 %
  20. A stone of mass 1 kg is tied to a string of length 1 m and whirled in a horizontal circle at a constant angular speed 5 rad/sec. The tension in the string is,
  21. Two loads of 50 kg and 75 kg are hung at the ends of a rope passing over a smooth pulley shown in below figure. The tension in the string is
  22. If the direction of projection bisects the angle between the vertical and the inclined plane, then the range of projectile on the inclined plane is
  23. Williot-Mohr diagram is used to determine deflection in
  24. If two forces acting at a point are in equilibrium, they must be equal in magnitude and their line of action must be along
  25. Force polygon method is applicable for