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Mechanical Engineering :: Engineering Mechanics

  1. A smooth cylinder lying on its convex surface remains in __________ equilibrium.

  2. A.

    stable

    B.

    unstable

    C.

    neutral

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  3. Coefficient of friction is the ratio of the limiting friction to the normal reaction between the two bodies.

  4. A.

    Yes

    B.

    No

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  5. Moment of inertia of a circular section about an axis perpendicular to the section is

  6. A.

    πd3/16

    B.

    πd3/32

    C.

    πd4/32

    D.

    πd4/64

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  7. The time of flight (t) of a projectile on an upward inclined plane is(where u = Velocity of projection, α = Angle of projection, and β = Inclination of the plane with the horizontal.)

  8. A.

    t = \( \frac {g cos\beta} { 2u sin(\alpha - \beta) } \)

    B.

    t = \( \frac {2u sin(\alpha - \beta)} { g cos\beta } \)

    C.

    t = \( \frac {g cos\beta} { 2u sin(\alpha + \beta) } \)

    D.

    t = \( \frac {2u sin(\alpha + \beta)} { g cos\beta } \)

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  9. The unit of angular acceleration is

  10. A.

    N-m

    B.

    m/s

    C.

    m/s2

    D.

    rad/s2

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