A question about inertia. (1 Viewer)

[~shinigami~]

Okay so the syllabus (Prelim) says that describe (or something) that an objects inertia is it's tendecy to remain at rest or in uniform motion.

My teacher says that even thought the law of intertia is that an object will remain at rest of in unform motion unless acted upon by an unbalanced external force but an object's inertia is described as it's mass.


Can somebody shed some light on this matter? What would be the answer to a question that asks what an object's inertai is.


Thank You in advance.

 

[SoulSearcher]

The original concept of inertia is indeed an object's tendency to remain at rest or in uniform motion, however an object's mass can describe its inertia, that is that the inertia of an object is related to its mass.

I shouldn't be saying things that I don't understand try here for more info:
http://en.wikipedia.org/wiki/Inertia

 

[zeek]

Inertia is a force that can be represented mathematically by F=ma .: the inertia of an object can be described in terms of its motion or its mass

If an objects motion is constant or zero then its acceleration is zero so it has no external force acting upon it and is experiencing intertia...
F=m x 0
.:F=0
Similarly the inertia of an object can be desribed as a mass to continue its current path of motion since this also means that its acceleration is zero as it is not changing direction or its not accelerating/deccelerating.
Therefore, inertia can be defined in terms of motion or mass.

 

[~shinigami~]

Thanks for answering my question guys.