The parabola in physics is caused by the fact that the horizontal direction is a uniform linear motion and the vertical direction is a free-falling motion, and the two speeds are inconsistent.

The parabola in mathematics is a quadratic function, which is a function with tangent slope of -b/2a and intercept of c.

The parabola in analytic geometry is y 2 = 2px, and p is the focal length. This is complicated and profound, so I'd better read a book by myself.

Are all the brothers upstairs in high school?

You know a lot about electromagnetism. Can I leave a QQ?