π bbc.co.uk
How to weigh a floating object without scales guide for KS3 physics students - BBC Bitesize
An article with a video showing that the upthrust equals the weight of water displaced for KS3 physics students aged 11-14 from BBC Bitesize.
β https://www.bbc.co.uk/bitesize/topics/z4brd2p/articles/z6sqmsg