Chapter 6: Q.33 (page 155)

An Airbus $A 320$ jetliner has a takeoff mass of $75, 000$ kg. It reaches its takeoff speed of $82 m / s (180 m p h)$ in $35$ s. 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 is $190, 000 N$

Step by step solution

Content Introduction

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

Content Explanation

We are given

speed is $v = 82 m / s$ in $t = 35 s$ . This will give us acceleration of the Airbus A320 $a = \frac{v}{t} = \frac{82}{35} = 2.343 m / s^{2}$

The force measured is given by

$F = m a F = 75, 000 \times 2.343 F = 175, 714 N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (1)$

Rolling friction is $μ_{s} = 0.020$

Therefore, we can say the friction force measured as

$F_{f} = μ_{s} m g F_{f} = 0.020 \times 75, 000 \times 9.81 F_{f} = 14, 715 N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (2)$

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

$F_{T} = F + F_{f} = 175, 714 + 14, 715 = 190429 ≃ 190, 000 N a p p r o x .$

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An Airbus $A 320$ jetliner has a takeoff mass of $75, 000$ kg. It reaches its takeoff speed of $82 m / s (180 m p h)$ in $35$ s. What is the thrust of the engines? You can neglect air resistance but not rolling friction

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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

Step by step solution

Content Introduction

Content Explanation

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Physics Textbooks

Famous Physicists

Astrophysics

Solid State Physics

Classical Mechanics

Work Energy and Power

Fundamentals of Physics

Study anywhere. Anytime. Across all devices.

An Airbus $A 320$ jetliner has a takeoff mass of $75, 000$ kg. It reaches its takeoff speed of $82 m / s (180 m p h)$ in $35$ s. What is the thrust of the engines? You can neglect air resistance but not rolling friction