Help with these please​

1.) when the distance between the two objects is dubled then the gravitational Force btw them is reduced by 4 times I.e it becomes 1/4 of original due to the inverse square law.

2.) because the distance from the center of earth and pole is less then the distance btw pole and equator that's why due to inverse square law .

the gravitational Force on object at equator is less then the object on poles.

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr