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  • Question

  • To double the period of oscillation of a simple pendulum


  • Options
  • A. the mass of its bob should be doubled
  • B. the mass of its bob should be quadrupled
  • C. its lenght should be quadrupled
  • D. its length should be doubled.

  • Correct Answer
  • its lenght should be quadrupled 

    • Applied Mechanics problems

    Search Results

    • 1. From a circular plate of a diameter 6 cm is cut out a circle whose diameter is equal to the radius of the plate. The C.G. of the remainder from the centre of circular plate is at a distance of

    • Options
    • A. 2.0 cm
    • B. 1.5 cm
    • C. 1.0
    • D. 0.5 cm.
      • Discuss
    • 2. A block of weight 50 kg is placed on a horizontal plane. When a horizontal force of 18 kg is applied, the block is just on the point of motion. The angle of friction is

    • Options
    • A. 17° 48'
    • B. 18° 48'
    • C. 19° 48'
    • D. 20° 48'
    • E. 21° 48'.
      • Discuss
    • 3. Energy may be defined as

    • Options
    • A. power of doing work
    • B. capacity of doing work
    • C. rate of doing work
    • D. all the above.
      • Discuss
    • 4. A weight of 100 kg is supported by a string whose ends are attached to pegs A and B at the same level shown in below figure. The tension in the string is

    • Options
    • A. 50 kg
    • B. 75 kg
    • C. 100 kg
    • D. 120 kg.
      • Discuss
    • 5. Total no of instantaneous centres of a machine having n links, is

    • Options
    • A. n/2
    • B. n
    • C. (n - 1)
    • D.
      • Discuss
    • 6. A particle executes a simple harmonic motion. While passing through the mean position, the particle possesses

    • Options
    • A. maximum kinetic energy and minimum potential energy
    • B. maximum kinetic energy and maximum potential energy
    • C. minimum kinetic energy and maximum potential energy
    • D. minimum kinetic, energy and minimum potential energy
    • E. none of these.
      • Discuss
    • 7. If ? is the angular acceleration of a compound pendulum whose angular displace ment is ?, the frequency of the motion is

    • Options
    • A. 2??/?
    • B.
    • C. 4??/?
    • D. 2?? - ?.
      • Discuss
    • 8. The acceleration of a particle moving along the circumference of a circle with a uniform speed, is directed

    • Options
    • A. radially
    • B. tangentially at that point
    • C. away from the centre
    • D. towards the centre.
      • Discuss
    • 9. The centre of gravity of a trapezoidal dam section whose top width is a, bottom width is b and the vertical side is a, from its vertical face is

    • Options
    • A.
    • B.
    • C.
    • D. none of these.
      • Discuss
    • 10. A train weighing 196 tonnes experiences a frictional resistance of per tonne. The speed of the train at the top of a down gradient 1 in 78.4 is 36 km/hour. The speed of the train after running 1 km down the slope, is

    • Options
    • A. 510 m/sec
    • B. 105 m/sec
    • C. 53 m/sec
    • D. 35 m/sec.
      • Discuss

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