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Civil Engineering :: Applied Mechanics

  1. If two bodies of masses M1 and M2(M1 > M2) are connected by alight inextensible string passing over a smooth pulley, the tension in the string, will be given by

  2. A.

    T = \(\frac { g(M1-M2) } { M1+M2 }\)

    B.

    T = \(\frac { g(M1+M2) } { M1*M2 }\)

    C.

    T = \(\frac { g(M2-M1) } { M1+M2 }\)

    D.

    \(\frac { g(M2+M1) } { M2-M1 }\)


  3. For a simple pendulum, the period of one oscillation is

  4. A.

    \(\sqrt{ll2g}\)

    B.

    2π \(\sqrt{2gll}\)

    C.

    2π \(\sqrt{llg}\)

    D.

    2π \(\sqrt{gl2l}\)


  5. A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The velocity ratio of the lifting machine is

  6. A.

    50

    B.

    55

    C.

    60

    D.

    65

    E.

    70


  7. The angle of friction is :

  8. A.

    The ratio of the friction and the normal reaction

    B.

    The force of friction when the body is in motion

    C.

    The angle between the normal reaction and the resultant of normal raction and limiting friction

    D.

    The force of friction at which the body is just about to move.


  9. The resultant of two forces acting at right angles is 5 kgf and if they act at an angle of 60°, it is 37 kgf. The magnitudes of the forces are:

  10. A.

    2 kgf, 3 kgf

    B.

    3 kgf, 4 kgf

    C.

    4 kgf, 5 kgf

    D.

    5 kgf, 3 kgf.


  11. A body A of mass 6.6 kg which is lying on a horizontal platform 4.5 m from its edge is connected to the end of a light string whose other end is supporting a body of mass 3.2 kg as shown in below figure. If the friction between the platform and the body A is 1/3, the acceleration is

  12. A.

    0.5 m/sec2

    B.

    0.75 m/sec2

    C.

    1.00 m/sec2

    D.

    1.25 m/sec2.


  13. The motion of a particle is described by the relation x = t2- 10t + 30, where x is in metres and t in seconds. The total distance travelled by the particle from t = 0 to t = 10 seconds would be

  14. A.
    zero
    B.
    30 m
    C.
    30 m
    D.

    60 m

    E.

    none of these.


  15. Three forces which act on a rigid body to keep it in equilibrium. The forces must be coplanar and

  16. A.

    concurrent

    B.

    parallel

    C.

    concurrent parallel

    D.

    none of these.


  17. A square hole is made in a circular lamina, the diagonal of the square is equal to the radius of the circleas shown in below figure the shift in the centre of gravity is

  18. A.

    \( \frac { r(n-0,75) } {( n-0.5) } \)

    B.

    \( \frac { r(n-0,25) } {( n-0.75) } \)

    C.

    \( \frac { r(n-0,5) } {( n-0.75) } \)

    D.

    \( \frac { r(n-0,5) } {( n-0.25) } \)


  19. For perfectly elastic bodies, the value of coefficient of restitution is

  20. A.

    zero

    B.

    0.5

    C.

    1.0

    D.

    between 0 and 1.