Without gravity, you can't shoot a basketball, you will fly all the way up, because without gravity, people dare not jump and never return to the ground. Unless someone helps you, the air will become thinner and thinner until there is insufficient oxygen, and people will become extinct because they can't breathe. This is a big problem, because inertia is that objects will be stupid to move. In fact, the people in front are not sure about the lack of inertia. Many existing laws of physics are wrong. For example, if you apply a force to an object in a vacuum with inertia, it will move forever. Without inertia, you have to constantly exert a force on it to keep it moving, so that everything we do will be more laborious. The car needs more power to move forward. Every step he takes will require a lot of strength as he just started, instead of just overcoming air resistance as he does now. There is also a man riding a car. I'm afraid I can't stand in the car. He can't stand still. His feet will fall off because of friction, and you dare not jump on the ground. When you jump, you will fall far away from the jumping point, because the earth will not turn again. You will hit a cliff or a wall and die. Then jumping will become an extreme sport. If inertia and gravity disappeared at the same time, you wouldn't shoot in the sky. Of course you won't shoot in, but you will throw a basketball like a box and move one square. Stop in mid-air, because there is no gravity, he will not fall, because there is no inertia, he will not continue to fly very far, and you will live in a world full of suspended objects. . . . . . . .