Astroids can be discribed a medorid because its one of the two things that creates a metorid
There's gravity, momentum, centripetal force, and friction involved.
Then a human would arrive at an asteroid.
It would depend on the size of the asteroid.
Not quite sure what you mean with hang from it; the asteroid would attract the building (much less so than Earth does, but still), so the asteroid would be "downward" for anybody close to the asteroid.In principle there is no reason why you couldn't build something on an asteroid, but that would not "hang... from the asteroid".
No, if the Earth was destroyed by an asteroid we would not be living today.
It couldn't as it's mass causes it to be spherical. To be like an asteroid, it would have to be the size of an asteroid, and then life would never have started. You would never have been born, and this question would never have existed.
If the asteroid is more than about 5 miles in diameter, the devastation would be worldwide. There would be nothing that anyone could do.
The asteroid belt is located between Mars and Jupiter.
A black hole would eventually swallow up the entire Earth. An asteroid would provoke great catastrophes - depending, of course, on the mass of the asteroid.
Which asteroid? depending on its size, an asteroid impact could be devastating for life on Earth, though life would recover somehow eventually.
you would burn up and die
This is a very vague question. Best that can be done is describe an asteroid. Asteroids very greatly in size, some are as large as planets. Asteroids generally have an irregular shape (Not rounded by its own gravity like a planet.) Most known asteroids lie within the asteroid belt, but many do not have a regular orbit. I would say, the closest thing to an asteroid, would be a meteoroid, which is basically a small asteroid and is often just a piece that has broken off of an asteroid.