How far does the jet travel during the 7 s?

Question

A jet aircraft with a mass of 4,400 kg has an engine that exerts a force (thrust) equal to 60,200 N.

(a) What is the jet's acceleration when it takes off? (Give the magnitude.)

(b)What is the jet's speed after it accelerates for 7 s? (Assume it starts from rest.)

(c) How far does the jet travel during the 7 s?

Answer 1

(a) F = ma, so a = 60200 / 4400 = 13.7 m/s²

(b) v = u + at, u = 0, a = 13.7, t = 7, so v = 95.9 m/s

(c) s = ut + 0.5 at², u = 0, a =13.7, t = 7 so s=335.7 m