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  • Question

  • A ball is dropped from a height of 2.25 m on a smooth floor and rises to a height of 1.00 m after the bounce. The coefficient of restitution between the ball and the floor is


  • Options
  • A. 0.33
  • B. 0.44
  • C. 0.57
  • D. 0.67

  • Correct Answer
  • 0.67 

    • Applied Mechanics problems

    Search Results

    • 1. Pick up the correct statement from the following. A rubber ball when strikes a wall rebounds but a lead ball of same mass and velocity when strikes the same wall, falls down

    • Options
    • A. rubber and lead balls undergo equal changes in momentum
    • B. change in momentum suffered by lead ball is less that of rubber ball
    • C. momentum of rubber ball is less than that of lead ball
    • D. none of these.
      • Discuss
    • 2. A rod 5 m in length is moving in a vertical plane. When it is inclined at 60° to horizontal, its lower end is moving horizontally at 3 m/sec and upper end is moving in vertical direction. The velocity of its upper end, is

    • Options
    • A. 0.5 m/sec
    • B. 1.0 m/sec
    • C. 1.5 m/sec
    • D. 2.5 m/sec
    • E. 3.0 m/sec
      • Discuss
    • 3. The moment of inertia of the shaded portion of the area shown in below figure about the X-axis, is

    • Options
    • A. 229.34 cm4
    • B. 329.34 cm4
    • C. 429.34 cm4
    • D. 529.34 cm4.
      • Discuss
    • 4. A trolley wire weighs 1 kg per metre length. The ends of the wire are attached to two poles 20 m apart. If the horizontal tension is 1000 kg, the central dip of the cable is

    • Options
    • A. 2 cm
    • B. 3 cm
    • C. 4 cm
    • D. 5 cm.
      • Discuss
    • 5. For perfectly elastic bodies, the value of coefficient of restitution is

    • Options
    • A. zero
    • B. 0.5
    • C. 1.0
    • D. between 0 and 1.
      • Discuss
    • 6. 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 :

    • Options
    • A. 2 kgf, 3 kgf
    • B. 3 kgf, 4 kgf
    • C. 4 kgf, 5 kgf
    • D. 5 kgf, 3 kgf.
      • Discuss
    • 7. 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

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 8. The force acting on a point on the surface of a rigid body may be considered to act

    • Options
    • A. at the centre of gravity of the body
    • B. on the periphery of the body
    • C. on any point on the line of action of the force
    • D. at any point on the surface normal to the line of action of the force.
      • Discuss
    • 9. 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

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 10. The angle of friction is :

    • Options
    • 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.
      • Discuss

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