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Mechanical Engineering :: Engineering Mechanics

  1. The cartesian equation of trajectory is(where u = Velocity of projection, α = Angle of projection, and xy = Co-ordinates of any point on the trajectory after t seconds.)

  2. A.

     y = \(\frac { gx^2 } { 2_{u^2}cos^2 \alpha } + x tan \alpha\)

    B.

    y = \(\frac { gx^2 } { 2_{u^2}cos^2 \alpha } - x tan \alpha\)

    C.

    y = \(x tan \alpha - \frac { gx^2 } { 2_{u^2}cos^2 \alpha } \)

    D.

    y = \(x tan \alpha + \frac { gx^2 } { 2_{u^2}cos^2 \alpha } \)


  3. In collision of elastic bodies, the coefficient of restitution is the ratio of the relative velocity after impact to the relative velocity before impact.

  4. A.

    True

    B.

    False


  5. In a framed structure, as shown in the below figure, the forces in the members AB and BC are respectively

  6. A.

    \(\sqrt 3 W\) (tensile) and 2W (compressive)

    B.

    2W(tensile) and \(\sqrt3 W\)(compressive)

    C.

    \(2\sqrt3 W\) (tensile) and \(2 \sqrt 3 W\) (compressive)

    D.

    none of the above


  7. The acceleration of a particle moving with simple harmonic motion is proportional to the displacement of the particle from the mean position.

  8. A.

    True

    B.

    False


  9. The unit of moment of inertia of an area is

  10. A.

    kg-m2

    B.

    kg-m-s2

    C.

    kg/m2

    D.

    m4