# I couldn't figure out something about mass and weight measurement

Today when I was studying physic for my University enterance exam I have stucked in one topic.

I understood the difference between mass and weight. Mass is the amount of material an object contains and weight is the force applied to that mass due to gravity or other source of potential force(like magnetic feild maybe, not sure)

But when it comes to measurement of mass and weight I just couldnt understand the fact we need at least a little bit gravity to measure mass but then whats the difference between weight and mass now? Without gravity or other force to an object I can't measure weight as well. I am just trying to imagine in very very very low gravity just enough to keep our feets on ground in a scenario like this if I measure the mass will it be same really? Or does that the mass we measure in earth isnt actually mass? just something close to it I just can not quite figure out this with an actual example.

I would be glad if someone explains this to me with an basic example.

• I dont know if there's a modern physics/relativistic/quantum definition for mass, but in classical terms, it is a measure of its inertia (its resistance to acceleration when a force is applied) it should be the same (again, outside a modern physics framework). – user190081 Oct 2 '18 at 13:33
• Attach the object to a spring and let it oscillate. Its period will depend on the mass ( as well as on the soring constant) even in zero gravity – b.Lorenz Oct 2 '18 at 14:04