INERTIA isn't a force, so it's....?

Question

Inertia is NOT a force, right?

So, it would be best described as... (CHOOSE ALL THAT APPLY)

mass
resistance to change in velocity
the tendency to maintain constant velocity
the force of gravity
resistance to acceleration
a force within the object
a property of matter

"resistance to change in velocity
the tendency to maintain constant velocity
resistance to acceleration
a property of matter"

as four answers isn't correct. I just got it wrong. So should be or shouldn't be in the definiton to make it correct, if it's not the combination of the four listed above?

Answer 1

Inertia means 'laziness' to changes

so obviously,
resistance to change in velocity,
the tendency to maintain constant velocity,
a property of matter,

All three of these choices qualify as applicable.
'resistance to acceleration', means force is going to act to oppose the external force..not property of inertia. ..got it right?

Answer 2

Hi. We know how it acts but not what it is. In other words we can describe characteristics of inertia without knowing what causes it. Based on this the following is what we can measure:
resistance to change in velocity
the tendency to maintain constant velocity
resistance to acceleration
a property of matter

I had read one theory that proposed that universal gravitation (the combined gravity of all objects) was the cause of inertia which could add 'the force of gravity' to the list, but this is not accepted as real yet. Hope this helps.

Answer 3

It's a resistance to change in velocity.
the tendency to maintain constant velocity
resistance to acceleration
a property of matter

Answer 4

the inertia is a tendecy of the body to keep its movement state.

Answer 5

it is the resistance offered by a mass which opposes its state of motion(or rest).