Is Earth Inertial Or Non-Inertial?

Earth is classified as both Inertial as well as Non-Inertial. But maximum times earth is taken as Inertial because we thought everything classically and which makes
our understanding better and easy.


  1. Earth has mass so that explains why it is taken as inertial. Why should it be considered non-inertial as well?
    Also, I’d like to join the telegram group of yours but can’t seem to get in.

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    1. As by Newton’s 2nd law we get to know the force(F=mdv/dt+vdm/dt in magnitude)which implies once velocity is constant and once mass. So, in simple words when mass is constant it is said to be NON-INERTIAL and when velocity is constant then it is INERTIAL. So, as we know mass is relative means it changes and hence Earth is Non-Inertial. But for our comfort and for making calculations easy we consider Earth as INERTIAL.

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