I have a hypothetical question about inertia.
Let's say I have an object with inertial mass a ton (2,000 lbs.), and it is sitting in my front yard, for instance. If it would suddenly become immune to gravity, i.e its gravitational mass becomes zero, what would happen to it? Now forget about whether this is actually possible, because science at its best tries to disprove itself. I just need to know what would happen to this block of iron sitting in my front yard if it would lose gravity.
Edit: By immune to gravity, I mean that it no longer is affected by gravity. It still has the same mass and everything else, it just isn't affected by gravity anymore.
I do have a reason for asking this. I said "ignore whether it's actually possible" because I know that everyone accepts it as fact that gravity can't be messed with (at least to my knowledge). However, I am the type that ask what if questions, so I asked "What if we could make an object not affected by gravity: What would happen to it?"
Translated into technical terms (from a comment): In the context of Newtonian mechanics, let there be a test particle with inertial mass $X$ but no gravitational mass, i.e., the test particle does not gravitate. The test particle is released from my front yard at t = 0. Describe the motion of the test particle.
Also, if you give technical answers (a good idea), please explain them in layman's terms, if that isn't asking too much. I more or less understand technical answer according to how they read in layman's terms.