พอดีลองซื้อเท็กมาอ่านแต่ไม่ค่อยเก่งอังกฤษอะครับ ช่วยแปลย่อหน้านี้หน่อยครับ
We can see that the x- and y- motions are independent for the simple projectile conditions under consideration. Elimination of the time t between the x- and y-displacement equations shows the path to be parabolic. If we were to introduce a drag force that depends on the speed squared (for example),then the x- and y- motions would be coupled(interdependent),and the trajectory would be nonparabolic.
ช่วยแปลย่อหน้านี้หน่อยครับ
We can see that the x- and y- motions are independent for the simple projectile conditions under consideration. Elimination of the time t between the x- and y-displacement equations shows the path to be parabolic. If we were to introduce a drag force that depends on the speed squared (for example),then the x- and y- motions would be coupled(interdependent),and the trajectory would be nonparabolic.