I get **ΣF = m*a** and gravity pull is **m*g**
But I was once told that there is no reason that the mass in both cases are the same. However, they happen to be according to our most precise measurement. Why wouldn’t they be the same? Can anything have different mass in regard of the context?
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We have never found any material which is effected by gravity differently from force. Some objects change mass over time, like rockets, but that doesn’t count.
There might be things like that, think dark matter, but there is no real definition of that which has been well supported by evidence.
If you have mass then your gravitational mass and inertial mass is the same. Of course, your gravitational mass can only be measured here on Earth, so that’s not super general.
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