The density, mass, and weight of the iron block make it difficult to lift than a cork block.
Step-by-step explanation:
The mass and weight of an object determine its heaviness. Mass refers to the matter contained in it and weight refers to the gravitational pull on the object. Iron has a larger mass and hence the gravitational pull is more. The mass of a body depends upon its density.
Iron is denser than a cork which is lighter. Hence, lifting a cork block is easier than lifting an iron block.