How does gravity involved?

Answer 1

If you could figure out what makes gravity happen you'd likely win a Nobel Prize. Gravity is the weakest of the four natural forces, being billions of times weaker than the other three (electromagnetism and the weak and strong nuclear forces). Basically gravity is the attraction that every particle in the universe has for every other particle in the universe. Matter makes a kind of dimple in the space-time continuum, kind of like placing a ball bearing on a rubber sheet only in three dimensions. If you rolled another ball bearing onto the sheet its path would curve because of the dimple made by the first one. The first one will also tend to roll toward the second one since the second one makes its own dimple. You get the idea. Gravity between two objects decreases as the square of the distance between them so if an object is twice as far then its gravitational effect is 4 times weaker.

Answer 2

Gravity does not move the planets, they already have their own energy and speed, but gravity makes them follow their orbits.

Without gravity any object travels at a constant speed in a straight line. A planet has the Sun's gravity pulling it sideways all the time, so it always accelerates towards the Sun and that is what produces the curved orbit.

The planet's energy is partially swapped between kinetic and potential as the planet travels in its ellpitical orbit. At perihelion (nearest the Sun) the kinetic energy is at its maximum, while at aphelion (furthest away) the potential energy is at its maximum.

Answer 3

i believe that the force which pulls the electrons towards the nucleus pulls us towards the earth.

Answer 4

You might need some professional help.