15. An aircraft weighing 919 N is accelerated at 11.9 m/s/s for 5 seconds, at which time the aircraft launches. Assume the acceleration is constant.

15. 

An aircraft weighing 919 N  is accelerated at 11.9 m/s/s for 5 seconds, at which time the aircraft launches. Assume the acceleration is constant. What is the force required to launch the aircraft?  Hint: this is a multiple step problem in which you must derive the variables needed in Newton's equation for force.