Tam in a F-22 that is on the runway. From rest, I accelerate the plane at 3.9m/s2 for 14.5s to reach take off velocity. Determine how long the runway
must be. The initial velocity is zero.

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.