Rocket scientists calculate the force needed for this quantity to rise high enough to escape a planet's gravitational pull.
Rocket scientists calculate the force needed for this quantity to rise high enough to escape a planet's gravitational pull. Objects in free fall accelerate until they reach the terminal type of this quantity. This quantity can change with either a change in direction or with (*) acceleration or deceleration, because it is a vector quantity, not a scalar. For ten points, name this physical quantity that describes speed in a direction.
Rocket scientists calculate the force needed for this quantity to rise high enough to escape a planet's gravitational pull.
velocity (accept escape velocity or terminal velocity; prompt on speed before "direction" is read)