หรือผมเข้าใจผิดมาตลอด gravity มันคือแรง force จริงๆหรือ ไปนั่งเรียนแล้วผมงงเลย

Gravity is most accurately described by the general theory of relativity (proposed by Albert Einstein in 1915) which describes gravity not as a force but as a consequence of the curvature of spacetime caused by the uneven distribution of mass/energy; and resulting in gravitational time dilation, where time lapses more slowly in lower (stronger) gravitational potential.

https://en.m.wikipedia.org/wiki/Gravity