How to implement element physics in a QT application?

Question

Qt

I just recently started to understand qt, I want to do a similar thing with graph physics, can you tell me how to implement it?

Answer 1

Some semblance of physical effects can be obtained from this https://doc.qt.io/qt-5/qeasingcurve.html

Answer 2

Qt knows nothing about "physics". She knows a little about geometry, in particular, she knows how to move, rotate and scale QGraphicsSceneItem, and can also find their intersection.
You will have to program the "physics" yourself - school textbooks on physics and geometry will help you.