question_answer

  In a hypothetical case, if the diameter of earth becomes half of its present value and mass becomes four times its present value, then how would the weight of any object on surface of the earth be affected?  

Answer:

                  Weight,           W =mg                                       (1/2) As mass is a constant                       (1/2)                                          (1/2) On bringing modifications,                                             (1/2) W becomes 16 times.