Physics

To calculate the work done by gravity during the entire process, we need to consider both the lifting and lowering parts.

Work done while raising the object

When the object is raised, the work done by gravity is negative because gravity acts in the opposite direction to the displacement. The gravitational force is:

The work done by gravity while raising the object to a height of 8 meters is:

Work done while lowering the object

When the object is lowered back to its original position, gravity acts in the same direction as the displacement, so the work done by gravity is positive. The work done by gravity during the lowering process is:

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