Gravity

Earth's gravity comes from all its mass. All its mass makes a combined gravitational pull on all the mass in your body. ... You exert the same gravitational force on Earth that it does on you. But because Earth is so much more massive than you, your force doesn't really have an effect on our planet.

Gravity&nbsp;is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planets in orbit around the sun.

What will happen if there will be no Gravity

Humans and other objects will become weightless without gravity. If we have no gravity force,&nbsp;the atmosphere would disappear into space, the moon would collide with the earth, the earth would stop rotating, we would all feel weightless, the earth would collide with the sun, and as a consequence. We would all perish.

How much Gravity should there on earth

The nominal "average" value at Earth's surface, known as standard gravity is, by definition,&nbsp;9.80665 m/s2. This quantity is denoted variously as gn, ge&nbsp;(though this sometimes means the normal equatorial value on Earth, 9.78033 m/s2), g0, gee, or simply g (which is also used for the variable local value).

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