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  • Question

  • The moment of inertia of a rectangular section 3cm wide and 4cm deep about X-X axis is


  • Options
  • A. 9cm4
  • B. 12cm4
  • C. 16cm4
  • D. 20cm4

  • Correct Answer
  • 16cm4 

    • Engineering Mechanics problems

    Search Results

    • 1. In collision of elastic bodies, the coefficient of restitution is the ratio of the relative velocity after impact to the relative velocity before impact.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Two blocks A and B of masses 150 kg and 50 kg respectively are connected by means of a string as shown in the below figure. The tension in all the three strings __________ be same.

    • Options
    • A. will
    • B. will not
      • Discuss
    • 3. If the efficiency of a lifting machine is kept constant, its velocity ratio is __________ propotional to its mechanical advantage.

    • Options
    • A. directly
    • B. inversely
      • Discuss
    • 4. Non-coplaner non-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. do not meet at one point but their lines of action lie on the same plane
    • D. none of the above
      • Discuss
    • 5. The wheels of a moving car possess

    • Options
    • A. potential energy only
    • B. kinetic energy of translation only
    • C. kinetic energy of rotation only
    • D. kinetic energy of translation and rotation both
      • Discuss
    • 6. The three forces of 100 N, 200 N and 300 N have their lines of action parallel to each other but act in the opposite directions. These forces are known as

    • Options
    • A. coplaner concurrent forces
    • B. coplaner non-concurrent forces
    • C. like parallel forces
    • D. unlike parallel forces
      • Discuss
    • 7. D' Alembert's principle basically depends upon Newton's second law of motion.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 8. A pendulum which executes one beat per second is known as

    • Options
    • A. simple pendulum
    • B. compound pendulum
    • C. torsional pendulum
    • D. second's pendulum
      • Discuss
    • 9. The unit of force in S.I. system of units is

    • Options
    • A. dyne
    • B. kilogram
    • C. newton
    • D. watt
      • Discuss
    • 10. The negative acceleration is called retardation.

    • Options
    • A. True
    • B. False
      • Discuss

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