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A hole is drilled along the diameter of ...

A hole is drilled along the diameter of the earth and pen is dropped into it. The time taken by it is reach other end of the earth is

A

84 min

B

42 min

C

21 min

D

102 hour

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Verified by Experts

The correct Answer is:
B
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AAKASH SERIES-OSCILLATIONS-EXERCISE -I Simple pendulum
  1. The period of oscillation of a box suspended by a string of length 1 i...

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  2. An oscillating simple pendulum is arranged in a vacuum jar, then

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  3. The bob of a simple pendulum is hollow. Now its time period is T. If i...

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  4. Pendulum clock shows correct time at O^(@)C. At a higher temperature t...

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  5. A seconds pendulum is taken from the surface of the earth to that of t...

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  6. The period of a simple pendulum suspended from the ceiling of a car is...

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  7. If iron sphere is replaced by wooden sphere of same mass, time period ...

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  8. A simple pendulum is a hollow sphere containing mercury suspended by m...

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  9. For a simple pendulum graph between L and T^(2) will be a

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  10. A hole is drilled along the diameter of the earth and pen is dropped i...

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  11. The work done by the string of a simple pendulum in one complete oscil...

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  12. The bob of a simple pendulum of period T is given a negative charge. I...

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  13. The time period of a pendulum in stationary lift is 'T', if lift start...

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  14. A rubber ball filled with water, having a small hole is used as the bo...

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  15. Identify the correct statement among the following

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  16. The restoring force which brings the bob towards the mean position is ...

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  17. To show that a simple pendulum is in a simple harmonic motion it is ne...

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  18. A simple pendulum is vibrating in an evacuated chamber. It will

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  19. A simple body hanging freely and at rest is vertical because in that p...

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  20. An object is released from rest. The time it takes to final through a ...

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