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  • Question
  • Varingon's theorem of moments states that if a number of coplaner forces acting on a particle are in equilibrium, then


  • Options
  • A. their algebraic sum is zero
  • B. their lines of action are at equal distances
  • C. the algebraic sum of their moments about any point in their plane is zero
  • D. the algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point.

  • Correct Answer
  • the algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point. 


  • Engineering Mechanics problems


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    • 1. One end of a helical spring is fixed while the other end carries the load W which moves with simple harmonic motion. The frequency of motion is given by(where ? = Deflection of the spring.)

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    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 2. Onejoule is equal to

    • Options
    • A. 0.1 N-m
    • B. 1 N-m
    • C. 10 N-m
    • D. 100 N-m
    • Discuss
    • 3. The unit of work in S.I. units is

    • Options
    • A. newton
    • B. erg
    • C. kg-m
    • D. joule
    • Discuss
    • 4. If three coplaner forces acting on a point are in equilibrium, then each force is proportional to the sine, of the angle between the other two.

    • Options
    • A. Correct
    • B. Incorrect
    • Discuss
    • 5. The centre of gravity of a right circular solid cone is at a distance of __________ from its base, measured along the vertical axis.(where h = Height of a right circular solid cone.)

    • Options
    • A. h/2
    • B. h/3
    • C. h/4
    • D. h/6
    • Discuss
    • 6. Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the depth (d), is

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    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 7. If the masses of both the bodies, as shown in the below figure, are doubled, then the acceleration in the string will be

    • Options
    • A. same
    • B. half
    • C. double
    • Discuss
    • 8. In actual machines, mechanical advantage is __________ velocity ratio.

    • Options
    • A. equal to
    • B. less than
    • C. greater than
    • Discuss
    • 9. The loss of kinetic energy during inelastic impact, is given by(where m1 = Mass of the first body,m2 = Mass of the second body, and u1 and u2 = Velocities of the first and second bodies respectively.)

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    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 10. The polygon law of forces states that if a number of forces, acting simultaneously on a particle, be represented in magnitude and direction by the sides a polygon taken in order, then their resultant is represented in magnitude and direction by the closing side of the polygon, taken in opposite direction.

    • Options
    • A. Correct
    • B. Incorrect
    • Discuss


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