Measuring g

A person standing on the north pole of the earth measures the acceleration due to gravity as 9.81 m.s2-9.81~m.s^2 by resting a 1 kg block on a spring scale and measuring the force exerted by the scale. What value for the magnitude of the acceleration of gravity in m/s2m/s^2 would a person on the equator measure if they performed this experiment?

Details and assumptions

  • You may treat the earth as a perfect sphere of radius 6370 km.
  • Take the length of a day to be exactly 24 hours.
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