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Mechanical Engineering :: Engineering Mechanics

  1. The centre of oscillation and centre of suspension for a compound pendulum are interchangeable.

  2. A.

    True

    B.

    False

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  3. In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load.

  4. A.

    less than

    B.

    equal to

    C.

    more than

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  5. The unit of work in S.I. units is

  6. A.

    newton

    B.

    erg

    C.

    kg-m

    D.

    joule

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  7. The static friction

  8. A.

    bears a constant ratio to the normal reaction between the two surfaces

    B.

    is independent of the area of contact, between the two surfaces

    C.

    always acts in a direction, opposite to that in which the body tends to move

    D.

    all of the above

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  9. The maximum height of a projectile on a horizontal plane, is

  10. A.

    \(\frac { u^2 sin^2\alpha } { 2g }\)

    B.

    \(\frac { u^2 cos^2\alpha } { 2g }\)

    C.

    \(\frac { u^2 sin^2\alpha } { g }\)

    D.

    \(\frac { u^2 cos^2\alpha } { g }\)

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