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  • Question

  • The C.G. of a hemisphere from its base measured along the vertical radius is at a distance of


  • Options
  • A. The C.G. of a hemisphere from its base measured along the vertical radius is at a distance of
  • B. The C.G. of a hemisphere from its base measured along the vertical radius is at a distance of
  • C. The C.G. of a hemisphere from its base measured along the vertical radius is at a distance of
  • D. The C.G. of a hemisphere from its base measured along the vertical radius is at a distance of
  • E. R/2.

  • Correct Answer
  •  

    • Applied Mechanics problems

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    • 1. 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
    • 2. 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
    • 3. 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
    • 4. 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.
      • Discuss
    • 5. 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
    • 6. 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
    • 7. The point about which combined motion of rotation and translation of a rigid body takes place, is known as

    • Options
    • A. Virtual centre
    • B. Instantaneous centre
    • C. Instantaneous axis
    • D. Point of rotation
    • E. All the above.
      • Discuss
    • 8. The motion of a bicycle wheel is

    • Options
    • A. translatory
    • B. rotary
    • C. rotary and translatory
    • D. curvilinear
      • Discuss
    • 9. If two equal forces of magnitude P act at an angle ?, their resultant, will be

    • Options
    • A. P cos ?/2
    • B. 2P sin ?/2
    • C. P tan ?/2
    • D. 2P cos ?/2
    • E. P sin ?/2.
      • Discuss
    • 10. In the structure shown in below figure, the member which carries zero force, is

    • Options
    • A. AB
    • B. BC
    • C. BE
    • D. BD
    • E. All the above.
      • Discuss

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