A transport plane takes off from a level landing field with two gliders in tow, one behind the other. The mass of each glider is 700 {\rm kg}, and the total resistance (air drag plus friction with the runway) on each may be assumed constant and equal to 2100N . The tension in the towrope between the transport plane and the first glider is not to exceed 12000 {\rm N}.

1 answer

and the question? What is the maximum acceleration?

F=ma
12000=(2*700)a