Without gravity, you can't shoot a basketball, you will fly all the way up, because there is no gravity to let him land. If you jump, you will never get back to the ground. Unless someone helps you, the air will get thinner and thinner until there is not enough oxygen. Humans will become extinct because they can't breathe.

Without inertia, the problem is big, because inertia means that objects will be stupid when they move. The people in front have no exact explanation for inertia. In fact, many laws of physics are wrong now. For example, if you apply force to an object in a vacuum with inertia, it will move forever. Without inertia, you must constantly exert force on it to keep it moving, so that everything will be more difficult for us, and the car needs more power to move forward. Motivation: Every step he takes will require as much strength as at the beginning, instead of just overcoming air resistance after starting now. Besides, I'm afraid I can't stand still in the car alone. He can't stand still. His feet will fall off because of friction, and you dare not jump on the ground. You will fall far from the jumping point, because the earth is turning again, and you won't. Then jumping will become an extreme sport.

If inertia and gravity disappear at the same time, then you won't shoot in the sky. Of course it won't go in, but it will come out like a box. Basketball moves a frame and stops in the air because there is no gravity, and because there is no inertia, it will not continue to fly very far. You will live in a world full of suspended objects. . . . . . . .