Originally Posted by
Wizofoz
Well, velocity is in relation to a frame of reference. If we are talking groundspeed, then relative to the ground.
The magnitude of velocity is the rate of change of position-m/s, km/hr, furlongs/ fortnight- it is how much your positionn has changed in the reference frame and how long the change took. I don't see how that can have a negative value.
Right, helicopter flying into a headwind such that it has a groundspeed of -2kts but at the same time an airspeed of 5kts . Pilot of helicopter uses yaw pedal to change heading by 180. What's the helicopter's groundspeed when it's on its new heading?