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Chapter 6: Q.33 (page 155)

An Airbus A320 jetliner has a takeoff mass of 75,000 kg. It reaches its takeoff speed of 82m/s(180mph) in 35s. What is the thrust of the engines? You can neglect air resistance but not rolling friction

Short Answer

Expert verified

The thrust of the engines is190,000N

Step by step solution

01

Content Introduction

The friction force is proportional to the normal force N exerted by the wall against the block.

02

Content Explanation

We are given

speed is v=82m/sin t=35s. This will give us acceleration of the Airbus A320 a=vt=8235=2.343m/s2

The force measured is given by

F=maF=75,000×2.343F=175,714N................................(1)

Rolling friction is μs=0.020

Therefore, we can say the friction force measured as

Ff=μsmgFf=0.020×75,000×9.81Ff=14,715N.............................................(2)

Add ( 1 ) and ( 2 ) to get the total force that is thrust of the engine

FT=F+Ff=175,714+14,715=190429≃190,000Napprox.

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