On which of the following objects all sitting on the ground together does earth exert a greater gravitational pull than your whole body

- a truck

- an elephant

Explanation:

The magnitude of the gravitational force exerted by Earth on an object is given by

where

G is the gravitational constant

M is the Earth's mass

m is the mass of the object

r is the distance between the Earth's center and the object

Therefore, we see that the larger the mass of the object, m, the greater the gravitational pull. Since the truck and the elephant have larger mass than a human body, Earth exerts a greater gravitational pull on these two objects.

i think the answer is a, hope this : )

+15-35=-20

going in opposite directions