Question

if an object have mass = 0 , is it possible?

Answer 1

The mass cannot be zero but the weight of an object can be change and it is not possible

Answer 2

Yeah ,but we don't call it as an object, we usually call it as electro magnetic wave,

Every electro magnetic wave has a mass nearly equal to 0,

Even the light you see has mass nearly equal to 0, so it travels at speed "c" !

If your mass also gets to 0, then you can also travel at speed c ,

Hope you understand,

Have a great day !!