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  • Question

  • Whenever a force acts on a body and the body undergoes a displacement, then


  • Options
  • A. work is said to be done
  • B. power is being transmitted
  • C. body has kinetic energy of translation
  • D. none of these

  • Correct Answer
  • work is said to be done 

    • Engineering Mechanics problems

    Search Results

    • 1. The resultant of the two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then

    • Options
    • A. P = Q
    • B. Q = R
    • C. Q = 2R
    • D. none of these
      • Discuss
    • 2. In a screw jack, the effort required to lift the load is given by(where W = Load lifted, ? = Helix angle, and ? = Angle of friction.)

    • Options
    • A. P = W tan (? - ?)
    • B. P = W tan (? + ?)
    • C. P = W tan (? - ?)
    • D. P = W cos (? + ?)
      • Discuss
    • 3. The maximum height of a projectile on a horizontal plane, is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 4. An irregular body may have more than one centre of gravity.

    • Options
    • A. Yes
    • B. No
      • Discuss
    • 5. The angle of inclination with the vertical is __________ if the cyclist is running at a faster speed than that when he is running at a slower speed.

    • Options
    • A. more
    • B. less
      • Discuss
    • 6. Moment of inertia of a circular section about its diameter (d) is

    • Options
    • A. ?d3/16
    • B. ?d3/32
    • C. ?d4/32
    • D. ?d4/64
      • Discuss
    • 7. When a particle moves along a straight path, there will be centripetal acceleration as well as tangential acceleration.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 8. 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
    • 9. 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
    • 10. 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

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