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Did you even read the links before posting them?
Do you believe a ball is a mechanical system?
You can have a manual input to a mechanical system. For example, pulling a lever to operate a machine.
The typical distinction is whether it uses and translates the input through various mechanisms. Moving a shutter with your thumb is not a mechanical shutter.
Flipping a switch or pushing a button to do same thing could be. The manual input is translated to a separate output instead of the person providing the energy directly.
Did I explain this middle school vocabulary lesson to your satisfaction?
Yes, yes, you did. Just as a middle school pupil would :)
🤷♂️
You can show them where it is, but you can’t make the jackasses drink the water.
Y’all have fun sharpening your mechanical pencils.
Not only are you being a condescending prick, you also cannot be bothered to be right. What a waste of a human life.
Poor fella