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Mechanical Engineering :: Engineering Mechanics

  1. A resultant force is a single force which produces the same effect as produced by all the given forces acting on a body.

  2. A.

    True

    B.

    False


  3. When a rigid body is suspended vertically, and it oscillates with a small amplitude under the action of the force of gravity, the body is known as

  4. A.

    simple pendulum

    B.

    compound pendulum

    C.

    torsional pendulum

    D.

    second's pendulum


  5. Moment of inertia of a hollow circular section, as shown in the below figure about X-axis, is

  6. A.

    \(\frac { n } { 16 } (D^2 - d^2)\)

    B.

    \(\frac { n } { 16 } (D^3 - d^3)\)

    C.

    \(\frac { n } { 32 } (D^4 - d^4)\)

    D.

    \(\frac { n } { 64 } (D^4 - d^4)\)


  7. If two blocks of equal mass are attached to the two ends of a light string and one of the blocks is placed over a smooth horizontal plane while the other is hung freely after passing over a smooth pulley, then the two blocks will have some motion.

  8. A.

    Agree

    B.

    Disagree


  9. During elastic impact, the relative velocity of the two bodies after impact is __________ the relative velocity of the two bodies before impact.

  10. A.

    equal to

    B.

    equal and opposite to

    C.

    less than

    D.

    greater than