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  • Question

  • If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is


  • Options
  • A. g/2
  • B. g/3
  • C. g/4
  • D. none of these

  • Correct Answer
  • none of these 

    • Engineering Mechanics problems

    Search Results

    • 1. The moment of inertia of a square of side a about its base is a4/ 3.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. If a pendulum is taken 1 km below the earth surface in a mine, it will __________ in time.

    • Options
    • A. gain
    • B. loose
      • Discuss
    • 3. Frequency of vibrations means the number of cycles per second.

    • Options
    • A. Yes
    • B. No
      • Discuss
    • 4. Mass moment of inertia of a thin rod about its one end is __________ the mass moment of inertia of the same rod about its mid-point

    • Options
    • A. same as
    • B. twice
    • C. thrice
    • D. four times
      • Discuss
    • 5. A circular hole of 50 mm diameter is cut out from a circular disc of 100 mm diameter as shown in the below figure. The centre of gravity of the section will lie

    • Options
    • A. in the shaded area
    • B. in the hole
    • C. at O
      • Discuss
    • 6. Coplaner concurrent forces are those forces which

    • Options
    • A. meet at one point, but their lines of action do not lie on the same plane
    • B. do not meet at one point and their lines of action do not lie on the same plane
    • C. meet at one point and their lines of action also lie on the same plane
    • D. do not meet at one point, but their lines of action lie on the same plane
      • Discuss
    • 7. The loss of kinetic energy due to direct impact of two bodies __________ upon the value of coefficient of restitution.

    • Options
    • A. depends
    • B. does not depend
      • Discuss
    • 8. The unit of power in S.I. units is

    • Options
    • A. horsepower
    • B. joule
    • C. watt
    • D. kg-m
      • Discuss
    • 9. The centre of gravity of a right angled triangle lies at its geometrical centre.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 10. If the gravitational acceleration at any place is doubled, then the weight of a body will be

    • Options
    • A. g/2
    • B. g
    • C. 2g
    • D. 2g
      • Discuss

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