void ExertForce()
{
currentThrust = thrustpercent * maxThrust * 1000f;
Vector3 thrustVector = thrustUnitVector.normalized * currentThrust; // [N]
physicsEngine.AddForces(thrustVector);
}
void FixedUpdate()
{
Vector3 velocityVector = physicsEngine.velocityVector;
float speed = velocityVector.magnitude;
float dragSize = CalculateDrag(speed);
Vector3 dragVector = dragSize * velocityVector.normalized;
physicsEngine.AddForces(-dragVector); // dragVector is applying in the opposite direction
}