# Would we levitate before a collision with a massive object?

Let's imagine a massive object $M$, about to enter in collision with Earth on west Europe. This object is way more massive than Earth. Before the collision, is there any objects on Earth that will be enough attracted to $M$ to move in the direction of it before the impact ?

Relatively light object would "levitate" from Earth point of view before the impact. Example of relatively light objects :

• Gas, particles and liquids: atmosphere, water, sand.
• Organics: animals, plants.

Of course this is true for Europe, would be interesting to know what happens on the other side of the planet. Would buildings crush?

I suppose the velocity of a given object changes when the gravity's force of $M$ on it is bigger than the gravity's force of Earth on the same object.

• Europe IS the other side of the planet. – ZeroTheHero Aug 18 '17 at 19:30

$$F = -G M m/r^2 = m(-GM/r^2) = ma$$ $$a = -GM/r^2$$