Holding that block stationary at arms length then. 0 work.
Put that block on a shelf at the same height. 0 work.
The fact that your muscles burn ATP just fighting gravity is a feature of biology, not fundamental to the physics involved.
If you want to read about another similar example, Google for rocket launch gravity losses.
alt Hacker News
Put that block on a shelf at the same height. 0 work.
The fact that your muscles burn ATP just fighting gravity is a feature of biology, not fundamental to the physics involved.
If you want to read about another similar example, Google for rocket launch gravity losses.