I was doing this experiment: i take a plastic cup, put in a container of water, it floats – then when I put a coin in the water, it sinks and rests at the bottom.
So to make the cup sink, i fill it with water – and the cup sinks, but it sinks until it's totally submerged with water and stops ( doesn't sink to the bottom )
Why did that happen? Why didn't it sink like the coin?
PS: I am aware of the presence of this thread, and it doesn't answer my question , so please do not mark duplicate.