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  • Question

  • The length of a Second's pendulum, is


  • Options
  • A. 99.0 cm
  • B. 99.4 cm
  • C. 100 cm
  • D. 101 cm
  • E. 101.10 cm.

  • Correct Answer
  • 99.4 cm 

    • Applied Mechanics problems

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    • 1. A projectile is thrown at an angle a to the horizontal with ? velocity v. It will have the maximum centripetal acceleration

    • Options
    • A. at the start
    • B. at the top of the trajectory
    • C. as it strikes the ground
    • D. else where.
      • Discuss
    • 2. A cable loaded with 0.5 tonne per horizontal metre span is stretched between supports in the same horizontal line 400 m apart. If central dip is 20 m, the minimum tension in the cable, will be

    • Options
    • A. 200 tonnes at the centre
    • B. 500 tonnes at the centre
    • C. 200 tonnes at the right support
    • D. 200 tonnes at the left support.
      • Discuss
    • 3. The total time of collision and restitution of two bodies, is called

    • Options
    • A. time of collision
    • B. period of collision
    • C. period of impact
    • D. all the above.
      • Discuss
    • 4. The resultant of two forces P and Q acting at an angle ?, is

    • Options
    • A. P2 + Q2 + 2P sin ?
    • B. P2 + Q2 + 2PQ cos ?
    • C. P2 + Q2 + 2PQ tan ?
    • D.
    • E.
      • Discuss
    • 5. The centre of gravity of a triangle is at the point where three

    • Options
    • A. medians of the triangle meet
    • B. perpendicular bisectors of the sides of the triangle meet
    • C. bisectors of the angle of the triangle meet
    • D. none of these.
      • Discuss
    • 6. Work may be defined as

    • Options
    • A. force x distance
    • B. force x velocity
    • C. force x acceleration
    • D. none of these.
      • Discuss
    • 7. The unit of Moment of Inertia of a body, is

    • Options
    • A. m
    • B. m2
    • C. m3
    • D. m4
    • E. none of these.
      • Discuss
    • 8. A satellite moves in its orbit around the earth due to

    • Options
    • A. Gravitational force
    • B. Centripetal force
    • C. Centrifugal force
    • D. none of these.
      • Discuss
    • 9. If the tension in a cable supporting a lift moving upwards is twice the tension when the lift is movng downwards, the acceleration of the lift, is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 10. The mechanical advantage of an ideal machine is 100. For moving the local through 2 m, the effort moves through

    • Options
    • A. 0.02 m
    • B. 2 m
    • C. 2.5 m
    • D. 20 m.
      • Discuss

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