Save guides, add subjects and pick up where you left off with your BBC account. The terms weight and mass are often used incorrectly. Phrases like ‘a bag of sugar weighs 1 kg’ are not ...

The terms weight and mass are often used incorrectly. Phrases like ‘a bag of sugar weighs 1 kg’ are not scientifically correct. This means that a 1 kg mass would be attracted to Earth by a ...