Explain the effect of earts gravity on objects on the
surface of earth

There's a pair (2) of equal and opposite forces of gravity between every two objects.  The strength of the forces depends on the mass of the objects.

The Earth's mass is so huge that, when an object is on or near the Earth's surface, we actually notice the force of gravity pulling the object toward the center of the Earth. We call that force the "weight" of the object.

Nobody ever talks about the force of gravity pulling the Earth toward the object, but it's equal.

Your weight on the Earth is EQUAL to the Earth's weight on YOU !

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.