
Concept explainers
A crane that can lift a maximum of 900–0 N is preparing to lift arid move an underwater concrete mooring. The 1.25 m×1.25m×0.450m concrete block is located in seawater. Verify that the crane is strong enough to lift the mooring by finding (a) its volume, (b) its dry-dock weight, (c) the water's buoyant force, and (d) the force needed to lift the mooring while it is under water. (Refer to Table12.2 for the mass density of concrete and of water.)

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