Download the App!

Get 24/7 study help with the Numerade app for iOS and Android! Enter your email for an invite.

Loss of power! In December of $1989,$ a KLM Boeing 747 airplane carrying 231 passengers entered a cloud of ejecta from an Alaskan volcanic eruption. All four engines went out, and the plane fell from $27,900$ ft to $13,300$ ft before the engines could be restarted. It then landed safely in Anchorage. Neglecting any air resistance and aerodynamic lift, and assuming that the plane had no vertical motion when it lost power, (a) for how long did it fall before the engines were restarted, and (b) how fast was it falling at that instant? c) In reality, why would the plane not be falling nearly as fast?

Get the answer to your homework problem.

Try Numerade free for 7 days

Like

Report

a) $\therefore$ The plane fell for 30.1 s before the engines were restarted.b) 295 $\mathrm{m} / \mathrm{s}$c) At the time the engines were stopped, the plane was moving horizontally and there was also air resistance. Therefore, in reality, the plane would not have been falling nearly as fast.

Physics 101 Mechanics

Chapter 2

Motion along a Straight Line

Physics Basics

Motion Along a Straight Line

Motion in 2d or 3d

Newton's Laws of Motion

Jason K.

January 29, 2022

Starting from rest, a boulder rolls down a hill with constant acceleration and travels 3.02 m during the first second

University of Michigan - Ann Arbor

University of Washington

University of Winnipeg

Lectures

03:28

Newton's Laws of Motion are three physical laws that, laid the foundation for classical mechanics. They describe the relationship between a body and the forces acting upon it, and its motion in response to those forces. These three laws have been expressed in several ways, over nearly three centuries, and can be summarised as follows: In his 1687 "Philosophiæ Naturalis Principia Mathematica" ("Mathematical Principles of Natural Philosophy"), Isaac Newton set out three laws of motion. The first law defines the force F, the second law defines the mass m, and the third law defines the acceleration a. The first law states that if the net force acting upon a body is zero, its velocity will not change; the second law states that the acceleration of a body is proportional to the net force acting upon it, and the third law states that for every action there is an equal and opposite reaction.

04:16

In mathematics, a proof is a sequence of statements given to explain how a conclusion is derived from premises known or assumed to be true. The proof attempts to demonstrate that the conclusion is a logical consequence of the premises, and is one of the most important goals of mathematics.

01:48

Loss of power! In December…

01:50

An airplane is flying hori…

03:51

A Boeing 787-9 jetliner ha…

01:57

Human terminal velocity. B…

04:12

You're in an airplane…

04:39

$\bullet$ $\bullet$ Human …

A 4.75 -kg radio-controlle…

01:58

A jet plane is flying at 1…

01:14

A jet airplane is travelin…

03:37

(II) The jet engine of an …

to the plane drops from 27,900 feet. Teo 13,300 feet, and this represents a 14,600 feet drop. Now we know that there are there for everyone. Leader, there are 3.281 feet. So in meters, this represents a 4,445 meter drop. Now for part A. We know that Delta y equals V Y initial t plus 1/2 g t squared. So we want to find out how long it took for this drop to occur under the influence of gravity. So this is going to be equal to zero because the why we're going to assume that the AA V Y initial of thie aircraft is going to be zero. So it was only moving horizontally and we can solve her t. This is equal the square root of two times Delta y divided by G, and this is going to be equal two. The square root of two times 4,445 divided by 9.8, and this will be equal to 30.1 seconds. So it's free, falling for about 30.1 seconds after it. Ah, in order to complete that 4,445 meter drop now to find the V Y final. At this point, the white final equals V Y initial plus GT view initial is going to be zero. We're assuming that the aircraft does not have any initial velocity in the white direction. And this was simply the equal Thio 9.8 times 30.1. So we're choosing downwards to be positive, and this is going to equal 295 meters per second again, this is going to be pointed downwards now. This is much, much higher than it would would be because we're neglecting a resistance and aerodynamic lift. So for part, see, what does this tell you about about about our assumptions. It is a very poor assumption to neglect the forces of a resistance and aerodynamic lift. That is the end of the solution. Thank you for watching

View More Answers From This Book

Find Another Textbook

Numerade Educator

02:11

Determine the vector which when added to the resultant of A=3i+5j+7k and B=2…

00:58

When do we use ellipses inside the quotations in-text?To represent artic…

01:15

What would happen if there are no muscles in our jaws?

00:54

Find the torque : For = 120 Neuton, Distance = 10

01:39

When we drag a box by applying a force which makes an angle (theta) the vert…

02:37

Find a unit vectornormal to the surface Z = x 2 + y2 at thepoint (1,…

02:04

Explain the reaction of one metal with oxygen and water by writing the chemi…

02:52

Two positive charges of same magnitudes are separated by some distance. If w…

01:36

Ramesh takes 15 minutes to reach market from his house on this cycle. If the…

00:29

(iii) The mercury in the capillary tube orclinical thermometer does not flow…