Why does an object made of a material denser than water sink when placed in water?
ABecause it lacks air inside it
BBecause water always sinks lighter objects
CBecause it has too much surface area
DBecause its weight exceeds the buoyant force provided by the displaced water
Explanation
An object sinks when its weight is greater than the buoyant force generated by the water it displaces, which happens when the object’s overall density is higher than that of water. Conversely, an object with a lower average density than water will float, even if it’s made of a dense material, as long as it is shaped to displace enough water, like a hollow steel ship. This relationship between density and buoyancy explains why some heavy objects still float. Explore more Everyday Science MCQs on mcqstutor to keep practicing.
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