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Home Mechanical Engineering Engineering Mechanics See What Others Are Saying!
  • Question
  • The total momentum of a system of masses (i. e. moving bodies) in any one direction remains constant, unless acted upon by an external force in that direction. This statement is called


  • Options
  • A. Newton's first law of motion
  • B. Newton's second law of motion
  • C. principle of conservation of energy
  • D. principle of conservation of momentum

  • Correct Answer
  • principle of conservation of momentum 


  • More questions

    • 1. The transfer of heat by molecular collision is smallest in

    • Options
    • A. solids
    • B. liquids
    • C. gases
    • D. none of these
    • Discuss
    • 2. The phosphorus and sulphur in steel making can be removed by using basic bessemer process.

    • Options
    • A. Correct
    • B. Incorrect
    • Discuss
    • 3. Discontinuous chips are formed during machining of

    • Options
    • A. brittle metals
    • B. ductile metals
    • C. hard metals
    • D. soft metals
    • Discuss
    • 4. If a pitot tube is placed with its nose upstream, downstream or sideways, the reading will be the same in every case.

    • Options
    • A. True
    • B. False
    • Discuss
    • 5. Within elastic limit, shear stress is __________ shear strain.

    • Options
    • A. equal to
    • B. less than
    • C. directly proportional to
    • D. inversely proportional to
    • Discuss
    • 6. The machinability of steel is improved by adding

    • Options
    • A. nickel
    • B. chromium
    • C. nickel and chromium
    • D. sulphur, lead and phosphorus
    • Discuss
    • 7. When the shear force diagram is a parabolic curve between two points, it indicates that there is a

    • Options
    • A. point load at the two points
    • B. no loading between the two points
    • C. uniformly distributed load between the two points
    • D. uniformly varying load between the two points
    • Discuss
    • 8. F. W. Taylor introduced a system of organisation known as

    • Options
    • A. line organisation
    • B. functional organisation
    • C. line and staff organisation
    • D. line, staff and functional organisation
    • Discuss
    • 9. When a plate is immersed in a liquid parallel to the flow, it will be subjected to a pressure __________ that if the same plate is immersed perpendicular to the flow.

    • Options
    • A. less than
    • B. more than
    • Discuss
    • 10. The maximum shear stress, in the given figure, is equal to __________ of the Mohr's circle.

    • Options
    • A. radius
    • B. diameter
    • C. circumference
    • D. area
    • Discuss


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