Assuming that it's flown well, the terminal velocity is just about the stall speed of the aircraft - between 80 and 150 mph.
If it's just falling out of the sky then it may exceed mach (aprox 750 mph).
rate of acceleration
Zero, by definition. "Terminal velocity" implies that the velocity no longer changes.
At terminal velocity (constant velocity), the acceleration is zero, but prior to that, there is a downward acceleration.
termial velocity has speed direction an acceleration
An object that has reached its terminal velocity is going at a constant velocity. Acceleration is the rate of change of the velocity. The rate of change is zero. Therefore, the acceleration is zero.
rate of acceleration
Zero, by definition. "Terminal velocity" implies that the velocity no longer changes.
zero
At terminal velocity (constant velocity), the acceleration is zero, but prior to that, there is a downward acceleration.
Acceleration is the CHANGE in velocity; you're assuming CONSTANT velocity. So the acceleration is zero.
termial velocity has speed direction an acceleration
For the most part, yes; once at terminal velocity, there is no acceleration, so it has direction.
Zero, by definition.
An object that has reached its terminal velocity is going at a constant velocity. Acceleration is the rate of change of the velocity. The rate of change is zero. Therefore, the acceleration is zero.
If the velocity is constant (i.e., there is no acceleration). Terminal velocity is an example, although any constant velocity would fit this description.
This is called Terminal Velocity. Gravity pulling downwards matches the air resistance pushing upwards to cancel the acceleration out. Many people misunderstand this and believe that this means that the object falling is no longer moving, but it is speaking in terms of acceleration, not speed. So the acceleration from before terminal velocity was reached will still be in affect, but the object will be neither gaining or losing speed.
The greatest velocity, achieved when the acceleration due to gravity is balanced by the aerodynamic deceleration, is called the terminal velocity.