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.
Conceptual Physics (12th Edition)
by Hewitt, Paul G.
Published by
Addison-Wesley
ISBN 10:
0321909100
ISBN 13:
978-0-32190-910-7
Chapter 13 - Think and Explain - Page 261-263: 50
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