College Physics
OER 2016 Edition
ISBN: 9781947172173
Author: OpenStax
Publisher: OpenStax College
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Textbook Question
Chapter 5, Problem 31PE
(a) The "lead" in pencils is a graphite composition with a Young's modulus of about
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The “lead” in pencils is a graphite composition with a Young’s modulus of about 1×10^9 N/m2. Calculate the change in length of the lead in an automatic pencil if you tap it straight into the pencil with a force of 4.0 N. The lead is 0.50 mm in diameter and 60 mm long. (b) Is the answer reasonable? That is, does it seem to be consistent with what you have observed when using pencils?
(a) The “lead” in pencils is a graphite composition with a Young’s modulus of about 1X10 N/m. Calculate the change in length of the lead in an automatic pencil if you tap it straight into the pencil with a force of 4.0 N. The lead is 0.50 mm in diameter and 60 mm long. (b) Is the answer reasonable? That is, does it seem to be consistent with what you have observed when using pencils?
The “lead” in pencils is a graphite composition with Young’s modulus of approximately 1.0×109 N/m2. Calculate the change in length of the lead in an automatic pencil if you tap it straight into the pencil with a force of 6.8 N. The lead is 0.52 mm in diameter and 80 mm long.
Round your answer to 5 decimal places.
Chapter 5 Solutions
College Physics
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