question_answer

  The radius of the earth at the poles is 6357 km and the radius at the equator is 6378 km. Calculate the percentage change in the weight of a body when it is taken from the equator to the poles.

Answer:

                  Let acceleration due to gravity at equator,  and acceleration due to gravity at poles,                                                (1) The variation of acceleration due to gravity, Percentage variation in g % Variation in the weight of a body = % Change in g = 0.7%                                                           (2)