A 'Knife Gate' was in operation at Nunhead Station with 20 Unifomed cops and at least 4 plain clothes today. Not Sure if it was a practice, Exercise or something more serious.
for a floating object on a liquid, the weight of the displaced liquid is the weight of the object. Thus, only in the special case of floating does the buoyant force acting on an object equal the objects weight.
Almost right. But. actually the arcimedes principle relates to weight. I got my physics o level! Its not volume! Just noticed hugs explained better than me.