Question

why the earth have gravity

Answer 1

The Earth has gravity just because it has mass. It would have almost exactly the same gravity even if it wasn't spinning at all. The gravitational effects of its spin are extremely subtle, and have not yet been reliably measured. Anything with mass has gravity, whether it be an atom or a planet. in fact you yourself have an indeterminably small gravitational effect on the earth for instance.

Answer 2

Answer:

Earth's gravity comes from all its mass. All its mass makes a combined gravitational pull on all the mass in your body. ... You exert the same gravitational force on Earth that it does on you. But because Earth is so much more massive than you, your force doesn't really have an effect on our planet.

Explanation: