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  • Question

  • On a ladder resting on a rough ground and leaning against a smooth vertical wall, the force of friction acts


  • Options
  • A. downwards at its upper end
  • B. upwards at its upper end
  • C. perpendicular to the wall at its upper end
  • D. zero at its upper end
  • E. none of these.

  • Correct Answer
  • zero at its upper end 

    • Applied Mechanics problems

    Search Results

    • 1. The reaction at the central support B of the beam ABC hinged at D shown in below figure is

    • Options
    • A. 2 t
    • B. 5.8 t
    • C. 0.2 t
    • D. 3.5 t.
      • Discuss
    • 2. A rigid body suspended Vertically at a point and oscillating with a small amplitude under the action of the force of gravity, is called

    • Options
    • A. simple pendulum
    • B. compour pendulum
    • C. Second's pendulum
    • D. none of these.
      • Discuss
    • 3. Power developed by a torque, is

    • Options
    • A. 2?NT kg m/min
    • B.
    • C.
    • D. all the above.
      • Discuss
    • 4. Pick up the correct statement from the following. The kinetic energy of a body

    • Options
    • A. before impact is equal to that after impact
    • B. before impact is less than that after impact
    • C. before impact is more than that after impact
    • D. remains constant
    • E. none of these.
      • Discuss
    • 5. In the structure shown in below figure, the member which carries zero force, is

    • Options
    • A. AB
    • B. BC
    • C. BE
    • D. BD
    • E. All the above.
      • Discuss
    • 6. The velocity of the fluid particle at the centre of the pipe section, is

    • Options
    • A. minimum
    • B. maximum
    • C. equal throughout
    • D. none of these.
      • Discuss
    • 7. Due to decrease of diameter of the droplet, inside pressure intensity

    • Options
    • A. increases
    • B. decreases
    • C. remains unaffected
    • D. None of these.
      • Discuss
    • 8. The main assumption of Bernoulli's equation is :

    • Options
    • A. The velocity of energy of liquid particle, across any cross-section of a pipe is uniform
    • B. No external force except the gravity acts on the liquid
    • C. There is no loss of energy of the liquid while flowing
    • D. All the above.
      • Discuss
    • 9. The terminal velocity (v) of a sphere of radius r and specific weight W, which travels vertically downwards in a liquid of viscosity ? and specific weight W, is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 10. The valve closure is said to be sudden if

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss

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