Physics Technology Update (4th Edition)

Published by Pearson
ISBN 10: 0-32190-308-0
ISBN 13: 978-0-32190-308-2

Chapter 8 - Potential Energy and Conservation of Energy - Problems and Conceptual Exercises - Page 247: 39

Answer

(a) Less than (b) III

Work Step by Step

(a) When the shuttle lands, there is a negative work done on it due to the friction of air resistance. Thus, the mechanical energy of the shuttle-Earth system is less than that of when it is in orbit. (b) We know that the correct option is statement (III) -- that is, a portion of the mechanical energy has been converted to heat energy.
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