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  • Question

  • The unit of work in S.I. units is


  • Options
  • A. newton
  • B. erg
  • C. kg-m
  • D. joule

  • Correct Answer
  • joule 

    • Engineering Mechanics problems

    Search Results

    • 1. 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
    • 2. 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
    • 3. The rate of doing work is known as

    • Options
    • A. potential energy
    • B. kinetic energy
    • C. power
    • D. none of these
      • Discuss
    • 4. 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.

    • Options
    • A. increase
    • B. decrease
    • C. not be effected
      • Discuss
    • 5. 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
    • 6. Onejoule is equal to

    • Options
    • A. 0.1 N-m
    • B. 1 N-m
    • C. 10 N-m
    • D. 100 N-m
      • Discuss
    • 7. 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
    • 8. 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
    • 9. Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the depth (d), is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 10. If the masses of both the bodies, as shown in the below figure, are doubled, then the acceleration in the string will be

    • Options
    • A. same
    • B. half
    • C. double
      • Discuss

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