Question

Starting from rest , an airplane (mass= 12,000 kg) accelerates 1,700 meters along a runway . What is the average net force on the plane if its final speed is 55 m/s ?

Answer 1

F = m*a

Answer 2

speed v depends on acceleration over time
there is no time given

Answer 3

v^2=u^2 + 2 a s

u=0
so,
55^2=2a(1700)
a=0.94

F=ma=(12000)(0.94)=11,318.91N (Correct to 2 decimal place)