/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q56E When its 75-kW (100-hp) engine i... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 1: Q56E (page 197)

When its 75-kW (100-hp) engine is generating full power, a small single-engine airplane with mass 700 kg gains altitude at a rate of 2.5 m/s(150 m/min or 500ft/min). What fraction of the engine power is being used to make the airplane climb? (The remainder is used to overcome the effects of air resistance and of inefficiencies in the propeller and engine.)

Short Answer

Expert verified

The fraction of engine power used to lift the airplane is 23%.

Step by step solution

01

Identification of given data

The given data can be listed below,

  • The power of the engine is, P=75kW
  • The mass of the airplane is, m=700kg
  • The velocity of the airplane is,2.5m/s
02

Concept/Significance of power

The amount of work done by the engine in unit time, gives the power of the engine. Its unit is Watts (W) .

03

Determination of the fraction of the engine power is used to make the airplane climb

The power of the single-engine use to lift the plane-

P=Fv=mgv

Here, m is the mass of the airplane, g is the acceleration due to gravity, and v is the speed of the airplane.

Substitute all the values in the above,

P=700kg9.8m/s22.5s=17.15kW

This is the part of power used by plane to climb so the fraction of power used is given by,

Pf=17.15kW75kW=0.23=23%

Thus, the fraction of engine power used by airplanes to climb is 23%.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

The 鈥渄irection of time鈥� is said to proceed from past to future. Does this mean that time is a vector quantity? Explain.

An antelope moving with constant acceleration covers the distance between two points 70.0apart in6.00s. Its speed as it passes the second point is15.0m/s. What are (a) its speed at the first point and (b) its acceleration?

An 8.00鈥�kg point mass and a12.00鈥�kg point mass are held50.0鈥�cm apart. A particle of mass mis released from a point between the two masses20.0鈥�cm from the8.00鈭�kg group along the line connecting the two fixed masses. Find the magnitude and direction of the acceleration of the particle.

A closed and elevated vertical cylindrical tank with diameter 2.00 m contains water to a depth of 0.800 m. A worker accidently pokes a circular hole with diameter 0.0200 m in the bottom of the tank. As the water drains from the tank, compressed air above the water in the tank maintains a gauge pressure of 5 X 103Pa at the surface of the water. Ignore any effects of viscosity. (a) Just after the hole is made, what is the speed of the water as it emerges from the hole? What is the ratio of this speed to the efflux speed if the top of the tank is open to the air? (b) How much time does it take for all the water to drain from the tank? What is the ratio of this time to the time it takes for the tank to drain if the top of the tank is open to the air?

A useful and easy-to-remember approximate value for the number of seconds in a year is饾洃脳107. Determine the percent error in this approximate value. (There are 365.24 days in one year.)
See all solutions

Recommended explanations on Physics Textbooks

Engineering Physics

Read Explanation

Waves Physics

Read Explanation

Nuclear Physics

Read Explanation

Measurements

Read Explanation

Famous Physicists

Read Explanation

Linear Momentum

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.