Asked by Saleh

A jumbo jet airplane has a mass of about 400,000 kg when fully loaded with over
400 passengers and takes off at a speed of 250 km/h. Determine;The takeoff speed when the airplane has 100 empty seats. Assume each passenger with luggage is 140 kg and the wing and flap settings are
maintained the same.

Answers

Answered by Damon
Lift == k v^2

Lift at 250 km/h = 400,000 g

100 * 140 = 14,000 kg
so lift needed = (400,000 -14,000) g Newtons
= 386 g Newtons

250^2/400,000 g = v^2 / 386,000 g

v^2 = 250^2 (386/400)
v = 250 sqrt (.965)
v = 245.6 km/h
Answered by Jadon
A 40 tonne jumbo jet accelerates down the runway at 5 m/s^2. What must be the thrust on each of its four engines? What is the horizontal force that a 700 N pilot exerts on his seat?
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