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  • Question

  • A rubber ball is dropped from a height of 2 m. If there is no loss of velocity after rebounding, the ball will rise to a height of


  • Options
  • A. 1m
  • B. 2m
  • C. 3m
  • D. 4m

  • Correct Answer
  • 2m 

    • Engineering Mechanics problems

    Search Results

    • 1. For a self locking machine, the efficiency must be

    • Options
    • A. equal to 50%
    • B. less than 50%
    • C. greater than 50%
    • D. 100%
      • Discuss
    • 2. The terms 'leverage' and 'mechanical advantage' Of a compound lever have got the same meaning.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 3. The centre of oscillation and centre of suspension for a compound pendulum are interchangeable.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. The periodic time (T) is given by(where ? = Angular velocity of particle in rad / s.)

    • Options
    • A. ?/2?
    • B. 2?/?
    • C. 2? x ?
    • D. ?/?
      • Discuss
    • 5. The polygon law of forces states that if a number of forces, acting simultaneously on a particle, be represented in magnitude and direction by the sides a polygon taken in order, then their resultant is represented in magnitude and direction by the closing side of the polygon, taken in opposite direction.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 6. The efficiency of a screw jack is maximum, when(where ? = Helix angle, and ? = Angle of friction.)

    • Options
    • A. ? = 45° + ?/2
    • B. ? = 45° - ?/2
    • C. ? = 90° + ?
    • D. ? = 90° - ?
      • Discuss
    • 7. 
      The above figure shows the three coplaner forces P, Q and R acting at a point O. If these forces are in equilibrium, then

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 8. The range of projectile(R) on an upward inclined plane is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 9. In a wormed geared pulley block, if the number of teeth on the worm wheel is doubled, then its velocity ratio is also doubled.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. In a framed structure, as shown in the below figure, the force in the member CD is tensile in nature.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss

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