How does gravity affect the planet Earth?

Answer 1

You’ve probably heard of the "force of gravity," and you may have heard of the equation "F=ma." What this equation means is that the force on an object is the same as the mass of the object multiplied by how much it’s being accelerated. The thing about gravity is that it has its own number for the "how much it’s being accelerated" part, and that number is the same pretty much anywhere on a planet. For gravity on the Earth, that number is about 9.81 (m/s^2).
Since that doesn’t change anywhere on Earth, the only thing that changes the force of gravity (as long as you’re on Earth) is the mass of the object (which is a lot like how much it weighs). For example, if you were to drop two balls off of the top of a building at the same time, you’d see that they both accelerate exactly the same way, no matter how much either one weighs!
The thing that will change that number (for the acceleration of gravity) is how big the planet is that you’re standing on. On the moon, for example, the acceleration of gravity (and the force of gravity) are about 1/6 of what they are on the Earth.
The Moon does, however, dominate tides on Earth. The Sun also causes tides on Earth, but they are smaller than those caused by the Moon. As a result, the effect of the Sun on tides is primarily seen as a modification of the extremity of the tides caused by the Moon. When the Sun, Moon and Earth are aligned (New Moon or Full Moon) the tidal forces of the Sun and Moon act together, and we get the highest high tides and the lowest low tides. These are called Spring tides (I don't know why). When there is a right angle between the Sun, Earth, and Moon (First and Third Quarter Moon, or what we'd also call a "half" Moon), the tidal force of the Sun partially cancels that of the Moon, and the tides are at their least extreme.

Answer 2

Thats a pretty broad question. Thier are entire text books dedicated to the subject, no just aspects of the subject. Lets start here... G-force (force of gravity) is a measure relative to the the force of gravity or acceleration on a body, which applied to a scale gives us a model to base forces of movement on. 1 G would be considerd stagnent atmosphere at sea level where 10 would be (10) that amount. the force of gravity is greatest at the surface and gradually decreases as you move away from our center, excluding several variables like the earth is not a perfect sphere. Anyway our body evolced around this principle. down force- force of gravity!!

Answer 3

gravity pulls masses together

Answer 4

it keeps us in orbit