Originally Posted by
WideScreen
No paper show to you, though I do have a PhD in physics......
Originally Posted by
WideScreen
What is the Kinetic energy of the airplane ?
I would submit that a question asking "
What is the Kinetic energy of the airplane ?" would require a specification of the frame of reference being used.
An aircraft stationary on the ground and experiencing a headwind has no kinetic energy with respect to the ground. However, if referenced to the airmass, it has kinetic energy proportional to the square of the wind speed.
For those struggling with this concept - an internet search for "frame of reference kinetic energy" will find lots of discussions including university texts, video presentations, and discussion in physics speciality groups. I found nothing that defined "the earth" or "ground" as the only valid frame of reference for kinetic energy. I found many examples that say kinetic energy depends on the frame of reference.
Last edited by EXDAC; 5th August 2022 at 16:37.