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  • Question

  • The law of motion involved in the recoil of gun is


  • Options
  • A. Newton's first law of motion
  • B. Newton's second law of motion
  • C. Newton's third law of motion
  • D. none of these

  • Correct Answer
  • Newton's third law of motion 

    • Engineering Mechanics problems

    Search Results

    • 1. In order to double the period of simple pendulum, the length of the string should be

    • Options
    • A. halved
    • B. doubled
    • C. quadrupled
      • Discuss
    • 2. The centre of gravity of a hemisphere lies at a distance of 3r / 8 from its base measured along the vertical radius.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 3. The velocity of a particle moving with simple harmonic motion is __________ at the mean position.

    • Options
    • A. zero
    • B. minimum
    • C. maximum
      • Discuss
    • 4. The acceleration of a particle moving with simple harmonic motion is __________ at themean position.

    • Options
    • A. zero
    • B. minimum
    • C. maximum
      • Discuss
    • 5. The moment of inertia of a solid cylinder of mass m, radius r and length l about the longitudinal axis or polar axis is

    • Options
    • A. mr2/2
    • B. mr2/4
    • C. mr2/6
    • D. mr2/8
      • Discuss
    • 6. The angle of the inclined plane at which a body just begins to slide down the plane, is called helix angle.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. 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
    • 8. 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
    • 9. Frequency of vibrations means the number of cycles per second.

    • Options
    • A. Yes
    • B. No
      • Discuss
    • 10. If a pendulum is taken 1 km below the earth surface in a mine, it will __________ in time.

    • Options
    • A. gain
    • B. loose
      • Discuss

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