No
Yes, there can be negative gravity. If a gravity is a pulling force then in the other hands a negative gravity would be a pushing force, in other words, the negative gravity would push us to wherever and the positive gravity on Earth would pull us.
Pushing forces are forces that result from an object being moved away from you, while pulling forces are forces that result from an object being moved towards you. In pushing, the force is exerted in the direction opposite to the motion, while in pulling, the force is exerted in the direction of the motion.
Nothing. Actually gravity is pushing you down but there is enough air resistance on the earth to stop us feeling heavy and crushed
3 forces gravity drag lift
Basically for the same reason that we don't sink into the Earth, despite gravity pulling us down. There is another force pushing us up - and there is another force pushing the hang glider up. In the case of the hang glider, the push is provided by the air.
Because you are an uneducated buffoon, who will never accept the fact that it is PULLING US down. It is in no way pushing us. There is no logic in it pushing us down, and the laws of Physics say that it is pulling us down. I am a Professor in MIT. Don't try and act oversmart.
When you float, the two main forces affecting you are gravity pulling you downward and buoyancy pushing you upward. Buoyancy is caused by the displaced water or other fluid pushing back up on your body, counteracting the force of gravity and allowing you to float.
pulling
After your finger stops pushing, there are two forces acting on the coin: gravity pulling it downward and the force of the table or surface pushing upward to support the coin and prevent it from falling.
Gravity . . . pulling you down. The scale . . . pushing you up. If these two forces were not equal, then there would be a net force on the bottom of your feet, either upward or downward, and you would be accelerating.
An object has positive buoyancy when it weighs less than the fluid it displaces. This causes the object to float in the fluid, as the buoyant force pushing upward is greater than the force of gravity pulling downward. Objects with positive buoyancy will naturally rise to the surface of a fluid.
The force pushing up is called the normal force. It is exerted upwards by a surface to support an object placed on it and counteract the force of gravity pulling the object downwards.