QA3- RELATIVE MOTION A helicopter is flying North-West at 80 m/s relative to the ground and the wind velocity is 15 m/s from the East. The helicopter's main rotor lies in a horizontal plane, has a radius of 6 m, and is rotating at 20 rad/s in a clockwise sense looking down on it. a) Calculate the helicopter's air speed and apparent heading through the air (i.e. both relative to the air). b) Calculate the maximum and minimum velocities of the blade-tips relative to the air. Hint: In hoth

QA3- RELATIVE MOTION A helicopter is flying North-West at 80 m/s relative to the ground and the wind velocity is 15 m/s from the East. The helicopter's main rotor lies in a horizontal plane, has a radius of 6 m, and is rotating at 20 rad/s in a clockwise sense looking down on it. a) Calculate the helicopter's air speed and apparent heading through the air (i.e. both relative to the air). b) Calculate the maximum and minimum velocities of the blade-tips relative to the air. Hint: In hoth

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Basic Terminology in Mechanics

The area of science and mathematics concerned the motion of the objects, the relation between the force matter, and motion if specified. Forces exerted over the objects result in displacements or changes in the position of an object concerning its environment. This branch of physics keeps its roots in Ancient Greece in the form of the scripts of Aristotle and Archimedes.

Question

QA3- RELATIVE MOTION
A helicopter is flying North-West at 80 m/s relative to the ground and the wind velocity is 15 m/s from
the East. The helicopter's main rotor lies in a horizontal plane, has a radius of 6 m, and is rotating at
20 rad/s in a clockwise sense looking down on it.
a) Calculate the helicopter's air speed and apparent heading through the air (i.e. both relative to the
air).
b) Calculate the maximum and minimum velocities of the blade-tips relative to the air.
Hint: In both parts, draw sketches to visualise what's happening. In the second part, only consider
the helicopter's motion through the air and the blade-tips' motion relative to the helicopter (i.e.
the air becomes your main reference frame, not the ground).

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