Question

if the earth were to reduce to half of its original size without any change in mass the duration of the new day will be A) 18 hrs B) 30hrs C) 6 hrs D) 12 hrs

Answer 1

Hi friend,

Given that

Radius of the earth is reduced to its half .

Mass remains the same.

By applying gravitational law,

F=GMm/r²

If r=r/2 ,then

F= 4 × 1/time

= 4×1/24

= 6 hours.


Hope this helped you a little!!!!