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  • Question

  • Centre of gravity of a thin hollow cone lies on the axis of symmmetry at a height of


  • Options
  • A. one-half of the total height above base
  • B. one-third of the total height above base
  • C. one-fourth of the total height above base
  • D. none of these.

  • Correct Answer
  • one-third of the total height above base 

    • Applied Mechanics problems

    Search Results

    • 1. For a self-locking machine, the efficiency should be

    • Options
    • A. less than 60%
    • B. 50%
    • C. more than 50%
    • D. None of these.
      • Discuss
    • 2. The reaction at the support D of the continuous beam ABCD, hinged at two points shown in below figure is

    • Options
    • A. 1.6 t ?
    • B. 1.6 t ?
    • C. 0.5 t ?
    • D. 0.5 t ?
    • E. 8.5 t ?
      • Discuss
    • 3. The motion of a particle moving with S.H.M. from an extremity to the other, constitutes

    • Options
    • A. half an oscillation
    • B. one full oscillation
    • C. two oscillations
    • D. none of these.
      • Discuss
    • 4. A particle is dropped from the top of a tower 60 m high and another is projected upwards from the foot of the tower to meet the first particle at a height of 15.9 m. The velocity of projection of the second particle is

    • Options
    • A. 16 m/sec
    • B. 18 m/sec
    • C. 20 m/sec
    • D. 22 m/sec.
      • Discuss
    • 5. The unit of impulse, is

    • Options
    • A. kg.m/sec
    • B. kg.m/sec3
    • C. kg.m/sec2
    • D. kg.m2/sec.
      • Discuss
    • 6. When a body falls freely under gravitational force, it possesses

    • Options
    • A. maximum weight
    • B. minimum weight
    • C. no weight
    • D. no effect on its weight.
      • Discuss
    • 7. Periodic time of a particle moving with simple harmonic motion is the time taken by the particle for

    • Options
    • A. half oscillation
    • B. quarter oscillation
    • C. complete oscillation
    • D. none of these.
      • Discuss
    • 8. The piston of a steam engine moves with a simple harmonic motion. The crank rotates 120 r.p.m. and the stroke length is 2 metres. The linear velocity of the piston when it is at a distance of 0.5 metre from the centre, is

    • Options
    • A. 5.88 m/sec
    • B. 8.88 m/sec
    • C. 10.88 m/sec
    • D. 12.88 m/sec.
      • Discuss
    • 9. The C.G. of a hemisphere from its base measured along the vertical radius is at a distance of

    • Options
    • A.
    • B.
    • C.
    • D.
    • E. R/2.
      • Discuss
    • 10. The gravitational force makes a satellite go round the earth in a circular orbit, if it is projected with an initial velocity of

    • Options
    • A. 8.04 km/sec at a height of 285 km
    • B. 11.11 km/sec at a height of 37, 400 km
    • C. 11.26 km/sec, the satellite escapes the pull of the earth
    • D. all the above.
      • Discuss

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