specifying the direction, and the magnitude should always be positive. A user could combine it all in a single equation-k * (x(t) * A.x). The only possible problem is that one also required to define the initial
Physicist: If the rocket doesn’t archtoomuch, then you can find the maximum height of a rocket by just standing around in a field and measuring the largest angle between the horizon and the rocket. If somehow you knew the north-south and east-west position of the rocket at the t...
Physicist: The very short answer is: use the spherical law of cosines so you can do trigonometry on a sphere. This is a seriously old problem that needed to be solved before we became a routinely globe-trotting species. If you have the latitude and longitud...