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Applied Mechanics problems

  • 1. ω rad/sec is the angular velocity of a crank whose radius is r. If it makes θ° with inner dead centre and obliquity of the connecting rod l is φ, the velocity v of the piston, is given by the equation

  • Options
  • A. ω2(l cos φ + r sin φ tan θ)
  • B. ω2(l sin φ + r cos φ tan θ)
  • C. ω(l sin φ + r cos φ tan θ)
  • D. ω2(l sin φ - r cos θ tan φ).
    • Discuss
  • 2. 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 :
    Civil Engineering Applied Mechanics: Two loads of 50 kg and 75 kg are hung at the ends of a rope passing over a smooth pulley shown in be

  • Options
  • A. 50 kg
  • B. 75 kg
  • C. 25 kg
  • D. 60 kg.
    • Discuss
  • 3. Kinetic friction may be defined as

  • Options
  • A. friction force acting when the body is just about to move
  • B. friction force acting when the body is in motion
  • C. angle between normal reaction and resultant of normal reaction and limiting friction
  • D. ratio of limiting friction and normal reaction.
    • Discuss
  • 4. For a particle moving with a simple harrmonic motion, the frequency is

  • Options
  • A. directly proportional to periodic time
  • B. inversely proportional to periodic time
  • C. inversely proportional to its angular velocity
  • D. directly proportional to its angular velocity
  • E. none of these.
    • Discuss
  • 5. A stone is whirled in a vertical circle, the tension in the string, is maximum

  • Options
  • A. when the string is horizontal
  • B. when the stone is at the highest position
  • C. when the stone is at the lowest position
  • D. at all the positions.
    • Discuss
  • 6. From the circular plate of a diameter 6 cm is cut out a circular plate whose diameter is equal to radius of the plate. The c.g. of the remainder shifts from the original position through

  • Options
  • A. 0.25 cm
  • B. 0.50 cm
  • C. 0.75 cm
  • D. 1.00 cm.
    • Discuss
  • 7. A retarding force on a body does not

  • Options
  • A. change the motion of the body
  • B. retard the motion of the body
  • C. introduce the motion of the body
  • D. none of these.
    • Discuss
  • 8. The units of inertia of mass, are

  • Options
  • A. kg/m
  • B. kg/m2
  • C. m4
  • D. m3
  • E. kg-m2.
    • Discuss
  • 9. Total no of instantaneous centres of a machine having n links, is

  • Options
  • A. n/2
  • B. n
  • C. (n - 1)
  • D.
    • Discuss
  • 10. A weight of 100 kg is supported by a string whose ends are attached to pegs A and B at the same level shown in below figure. The tension in the string is
    Civil Engineering Applied Mechanics: A weight of 100 kg is supported by a string whose ends are attached to pegs A and B at

  • Options
  • A. 50 kg
  • B. 75 kg
  • C. 100 kg
  • D. 120 kg.
    • Discuss

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