An airplane flies horizontally at 70 m/s. Its propeller delivers 1350 N of thrust (forward force) to overcome aerodynamic drag (backward force). Using dimensional reasoning and unity conversion ratios, calculate the useful power delivered by the propeller in units of kW and horsepower. The useful power delivered by the propeller in units of kW is [ 94.5 KW. The useful power delivered by the propeller in units of horsepower is 126.67 hp.

An airplane flies horizontally at 70 m/s. Its propeller delivers 1350 N of thrust (forward force) to overcome aerodynamic drag (backward force). Using dimensional reasoning and unity conversion ratios, calculate the useful power delivered by the propeller in units of kW and horsepower. The useful power delivered by the propeller in units of kW is [ 94.5 KW. The useful power delivered by the propeller in units of horsepower is 126.67 hp.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Unit Conversion

Standard units are also called SI units. SI units are used for measuring a physical quantity satisfying certain conditions. There are two types of units: fundamental units and derived units. Fundamental units are physical quantities that are independent, that is, they do not depend on other quantities like mass, length, or time. There are plenty of quantities in our lives which need to be measured and compared. Measuring is the comparison of a particular physical quantity with its reference value. A unit is a measure of a fixed physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with.

Question

An airplane flies horizontally at 70 m/s. Its propeller delivers 1350 N of thrust (forward force) to overcome aerodynamic drag
(backward force). Using dimensional reasoning and unity conversion ratios, calculate the useful power delivered by the propeller in
units of kW and horsepower.
The useful power delivered by the propeller in units of kW is 94.5 KW.
The useful power delivered by the propeller in units of horsepower is
126.67 hp.

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