Question

how can you say that the earth has gravitation ...... either how can you check out without having any trouble

Answer 1

try the newton idea throw an apple upwards an tell it come down so it will tell u that earth has gravitation

Answer 2

we can check
see
if u throw a ball to the up y that ball cannot be up only y it will come again to the earth surface
so this means there is a gravitation
the earth is trying to pull the heavier objects only not the lighter objects for example NASA
jet they had sent this jet to another planet
with a heavy force if force is not there then they have a gravitation if force is present then gravitation is their but only little