fall into the sun
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You wouldn't fall into the sun, unless there was next-to-no gravity. You would be able to jump higher, but we would have a smaller atmosphere, and less oxygen to breath. So basically, your would hit your head off your roof, and have less air to breath =)
There's no known reason why anything should happen to Earth's gravity, and nothing is expected to.
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.
It will never happen because the earth's gravity is caused by it's mass and it's density.
A reversal in Earth's gravity from positive to negative could have catastrophic consequences. It could lead to mass destruction of infrastructure, loss of life, and disruption of ecosystems. The change in gravity would affect everything on Earth, causing chaos and instability.
earth's gravity
All the objects will float if there will be no gravity. Gravity is the earth's pull on objects.
The force of gravity pulls things towards Earth. Gravity is a fundamental force in the universe that causes objects with mass to be attracted to each other. On Earth, gravity keeps us anchored to the ground and influences the motion of everything on the planet.
gravity
it helps things to not float
gravity
Gravity pulls things towards the centre of the Earth. If this weren't the case, then in different areas of the world gravity would have a different pull.
we can fly