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  • Question

  • Tension in the cable supporting a lift is more when the lift is moving __________ with an acceleration.


  • Options
  • A. upwards
  • B. downwards

  • Correct Answer
  • upwards 

    • Engineering Mechanics problems

    Search Results

    • 1. Two bodies of masses m1,and m2 are hung from the ends of a rope, passing oyer a frictionless pulley as shown in the figure below. The acceleration of the string will be

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 2. The centre of gravity of an is osceles triangle with base (p) and sides (q) from its base is

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    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 3. In a framed structure, as shown in the below figure, the force in the member AC is numerically equal to the force in member BC.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 4. The centre of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.

    • Options
    • A. 3r/ 8
    • B. 4r/ 3?
    • C. 8r/3
    • D. 3r/4?
      • Discuss
    • 5. In ideal machines, mechanical advantage is __________ velocity ratio.

    • Options
    • A. equal to
    • B. less than
    • C. greater than
      • Discuss
    • 6. The moment of inertia of a square of side a about its diagonal is

    • Options
    • A. a2/8
    • B. a3/12
    • C. a4/12
    • D. a4/16
      • Discuss
    • 7. According to the law of moments, 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
    • 8. A lift moves downwards with an acceleration of 9.8 m/s2. The pressure exerted by a man on the floor of the lift is zero.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. The maximum efficiency of a screw jack is

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    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 10. The resultant of two forces P and Q acting at an angle ? is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss

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