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Mechanical Engineering :: Engineering Mechanics

  1. The centre of gravity a T-section 100 mm x 150 mm x 50 mm from its bottom is

  2. A.

    50mm

    B.

    75mm

    C.

    87.5mm

    D.

    125mm

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  3. In order to completely specify angular displacement by a vector, it must fix

  4. A.

    direction of the axis of rotation

    B.

    magnitude of angular displacement

    C.

    sense of angular displacement

    D.

    all of these

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  5. Which of the following statement is correct in connection with projectiles?

  6. A.

    A path, traced by a projectile in the space, is known as trajectory.

    B.

    The velocity with which a projectile is projected, is known as the velocity of projection.

    C.

    The angle, with the horizontal, at which a projectile is projected is known as angle of projection.

    D.

    all of the above

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  7. The acceleration of a body sliding down an inclined surface is

  8. A.

    g sin θ

    B.

    g cos θ

    C.

    g tan θ

    D.

    none of these

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  9. If a body is acted upon by a number of coplaner non-concurrent forces, it may

  10. A.

    rotate about itself without moving

    B.

    move in any one direction rotating about itself

    C.

    be completely at rest

    D.

    all of these

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