Asked by emily
A 20000 kg airplane takes off by traveling 300 m down a runway while the engines exert a continuous force of 4000 N.(a) Calculate the change in kinetic energy of the airplane during takeoff.(b) Determine the speed of the airplane as it leaves the runway.
Answers
Answered by
Damon
Work in = change in Ke = force * distance
= 4000 * 300 = 12*10^5
so
(1/2)(2*10^5) v^2 = 12*10^5
v^2 = 12
v = 2 sqrt3
4,000 N is not enough to get this plane off the ground.
= 4000 * 300 = 12*10^5
so
(1/2)(2*10^5) v^2 = 12*10^5
v^2 = 12
v = 2 sqrt3
4,000 N is not enough to get this plane off the ground.
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