Gravitation Question 319

Question: The speed of earth’s rotation about its axis is cd. Its speed is increases to x times to make the effective acceleration due to gravity equal to zero at the equator. Then x is:

Options:

A) 1

B) 8.5

C) 17

D) 34

Show Answer

Answer:

Correct Answer: C

Solution:

  • [g=gω2R,] for g? to be zero, [ω=g/R17ω]


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