What is the lifting force exerted by a concrete block that displaces water?

To determine the lifting force exerted by a concrete block that displaces water, we need to consider the principle of buoyancy. According to Archimedes' principle, the buoyant force (or lifting force) that acts on an object submerged in a fluid is equal to the weight of the fluid that the object displaces.

In this case, the concrete block would displace a volume of water equal to its own submerged volume. The weight of the water displaced can then be calculated based on the volume displaced and the density of water. The standard density of water is approximately 62.4 lbs per cubic foot.

When calculations are made considering the dimensions of the concrete block and the specific gravity of concrete (which is typically around 2.4), one can derive the exact lifting force based on how much water is being displaced by that specific block.

The lifting force of 60,847 lbs indicates a precise calculation based on the volume of the concrete block and the weight of the corresponding amount of water displaced. This value points to the understanding that the weight of the concrete block in question leads to that specific buoyant force when submerged.

Thus, when evaluating the question, this choice accurately reflects the buoyant force exerted by the concrete block