Home Table of Contents About the Authors Glossary Buy This Book Joseph Henry Press

Exercise 8

see solution

motion: TOC for Knowledge Concepts, Exercises, and Solutions

We see a jet airplane flying overhead, and we notice that it travels a fully open, 
outstretched hand width (from tip of thumb to tip of pinky) in 15 seconds.  We 
also know that commercial aircraft typically cruise at about 35,000 feet.  How 
fast is this jet going, in miles per hour?  Does your answer make numerical sense?