Which of the following has a greater gravitational pull on the Earth?

1000 kilogram hippopotamus

100 kilogram human

0.1 kilogram mouse

1 kilogram cat

Answer: 1000 kilogram hippopotamus

Explanation: The gravitational "pull" or gravitational force can be written as:

F = G*m1*m2/r^2

Where G is a positive constant, called the "gravitational constant"

m1 and m2 are the masses of the objects, and r is the distance between the objects.

Now, you can see that the gravitational force grows with the mass of the objects, so objects with bigger mass will experience bigger forces, then, the option that has a greater gravitational pull on Earth is the option with bigger mass, in this case, the 1000kg hippopotamus.

Now, this gravitational force is what we call "weight", and is kinda easy to see that the animal that weights more in all the options is the 1000kg hippopotamus

1000 kilogram hippopotamus

Explanation:

The more massive an object, the more gravitational pull there is. Because of Newton's third law, the hippo also has an opposite gravitational pull on the earth.