Here is the problem:
I have a spaceship flying into space (3D world), so no gravity, no frictions etc, with a certain velocity and direction (heading).
The spaceship changes heading, the velocity direction clearly remain the same, then i apply a force of X Netwon in the opposite direction of the velocity. Now i want to apply a force in the heading direction so that it counterbalance the deceleration due to the previous force.. meaning that the velocity length vector has to be constant (but clearly the direction won't be).
It "should" be simple but for the life of me i can't get the amount of Netwon i have to give.