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Mechanical Engineering :: Engineering Mechanics

  1. The centre of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.

  2. A.

    3r/ 8

    B.

    4r/ 3π

    C.

    8r/3

    D.

    3r/4π

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  3. The process of finding out the resultant force is called __________ of forces.

  4. A.

    composition

    B.

    resolution

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  5. A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is

  6. A.

    reversible

    B.

    non-reversible

    C.

    ideal

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  7. In a framed structure, as shown in the below figure, the force in the member BC is

  8. A.

    \({ Wl} \sqrt{ 3 } \)(compression)

    B.

    \({ Wl} \sqrt{ 3 } \) (tension)

    C.

    \({ 2Wl} \sqrt{ 3 } \) (compression)

    D.

    \({ 2Wl} \sqrt{ 3 } \)  (tension)

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  9. The potential energy of a vertically raised body is __________ the kinetic energy of a vertically falling body.

  10. A.

    equal to

    B.

    less than

    C.

    greater than

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