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Engineering Mechanics problems

  • 1. The linear acceleration (a) of a body rotating along a circular path of radius (r) with an angular acceleration of ? rad / s2, is

  • Options
  • A. a = ?/ r
  • B. a = ?.r
  • C. a = r / ?
  • D. none of these
    • Discuss
  • 2. A framed structure is imperfect, if the number of members are __________ (2j - 3).

  • Options
  • A. equal to
  • B. less than
  • C. greater than
  • D. either (b) or (c)
    • Discuss
  • 3. A block ot mass 20 kg lying on a rough horizontal plane is connected by a light string passing over a smooth pulley to another mass 5 kg, which can move freely in the Vertical direction, as shown in the below figure. The tension in the string will __________ with the increase in coefficient of friction.
    Mechanical Engineering Engineering Mechanics: A block ot mass 20 kg lying on a rough horizontal plane is connected by a light string passing over

  • Options
  • A. increase
  • B. decrease
  • C. not be effected
    • Discuss
  • 4. The rate of doing work is known as

  • Options
  • A. potential energy
  • B. kinetic energy
  • C. power
  • D. none of these
    • Discuss
  • 5. The centre of gravity of a right circular solid cone is at a distance of __________ from its base, measured along the vertical axis.(where h = Height of a right circular solid cone.)

  • Options
  • A. h/2
  • B. h/3
  • C. h/4
  • D. h/6
    • Discuss
  • 6. If three coplaner forces acting on a point are in equilibrium, then each force is proportional to the sine, of the angle between the other two.

  • Options
  • A. Correct
  • B. Incorrect
    • Discuss
  • 7. The unit of work in S.I. units is

  • Options
  • A. newton
  • B. erg
  • C. kg-m
  • D. joule
    • Discuss
  • 8. Onejoule is equal to

  • Options
  • A. 0.1 N-m
  • B. 1 N-m
  • C. 10 N-m
  • D. 100 N-m
    • Discuss
  • 9. One end of a helical spring is fixed while the other end carries the load W which moves with simple harmonic motion. The frequency of motion is given by(where ? = Deflection of the spring.)

  • Options
  • A.
  • B.
  • C.
  • D.
    • Discuss
  • 10. Varingon's theorem of moments states that if a number of coplaner forces acting on a particle are in equilibrium, then

  • Options
  • A. their algebraic sum is zero
  • B. their lines of action are at equal distances
  • C. the algebraic sum of their moments about any point in their plane is zero
  • D. the algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point.
    • Discuss

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