Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 13 - Think and Explain: 50

Answer

A sharp knife has a narrower and smaller cutting area compared to a dull knife. With a smaller area, the same pushing force results in more pressure to cleave the surface that the knife is pressed against.
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