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Civil Engineering :: Applied Mechanics and Graphic Statics

  1. Two forces act an angle of 120°. If the greater force is 50 kg and their resultant is perpendicular to the smaller force, the smaller force is

  2. A.

     20 kg

    B.

     25 kg

    C.

     30 kg

    D.

     35 kg

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  3. M.I. of solid sphere, is

  4. A.

     ⅔ Mr²

    B.

     ½ Mr²

    C.

     Mr²

    D.

     πr4/2

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  5. The following is not a law of static friction:

  6. A.

     The force of friction always acts in a direction opposite to that in which the body tends to move

    B.

     The force of friction is dependent upon the area of contact

    C.

     The force of friction depends upon the roughness of the surface

    D.

     The magnitude of the limiting friction bears a constant ratio to the normal reaction between two surfaces

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  7. A hoop of radius 3 m weighs 100 kg. It rolls along a horizontal floor so that at its centre of mass has a speed of 200 mm/sec. The work required to stop the hoop is

  8. A.

     2 J

    B.

     4 J

    C.

     6 J

    D.

     8 J

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  9. A satellite moves in its orbit around the earth due to

  10. A.

     Gravitational force

    B.

     Centripetal force

    C.

     Centrifugal force

    D.

     None of these

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  11. A satellite goes on moving along its orbit round the earth due to

  12. A.

     Gravitational force

    B.

     Centrifugal force

    C.

     Centripetal force

    D.

     None of these

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  13. A bullet weighing 200 g is fired horizontally with a velocity of 25 m/sec from a gun carried on a carriage which together with the gun weighs 100 kg. The velocity of recoil of the gun, will be

  14. A.

     0.01 m/sec

    B.

     0.05 m/sec

    C.

     1.00 m/sec

    D.

     1.5 m/see

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  15. Two objects moving with uniform speeds are 5 m apart after 1 second when they move towards each other and are 1 m apart when they move in the same direction.
    The speeds of the objects are:

  16. A.

     2 m/sec and 2 m/sec

    B.

     3 m/sec and 2 m/sec

    C.

     3 m/sec and 3 m/sec

    D.

     4 m/sec and 6 m/sec

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  17. Periodic time of a particle moving with simple harmonic motion is the time taken by the particle for

  18. A.

     Half oscillation

    B.

     Quarter oscillation

    C.

     Complete oscillation

    D.

     None of these

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  19. If a particle moves with a uniform angular velocity ‘ω’ radians/sec along the circumference of a circle of radius ‘r’, the equation for the velocity of the particle, is

  20. A.

     v = ω √(y² - r²)

    B.

     y = ω √(y - r)

    C.

     v = ω √(r² + y²)

    D.

     v = ω √(r² - y²)

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