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정역학 5판 솔루션 Bedford Fowler

등록일 : 2011-03-10
갱신일 : 2012-02-16


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정역학 5판입니다.
사진, 그래프가 많은데 깨짐없이 잘 나옴니다..
Problem 1.1 The value of is 3.14159265. . . If C is the circumference of a circle and r is its radius, determine the value of r/C to four signi?cant digits.

Solution: C D 2 r )

r 1 D D 0.159154943. C 2 r D 0.1592 C

To four signi?cant digits we have

Problem 1.2 The base of natural logarithms is e D 2.718281828 . . . (a) (b) (c) Express e to ?ve signi?cant digits. Determine the value of e2 to ?ve signi?cant digits. Use the value of e you obtained in part (a) to determine the value of e2 to ?ve signi?cant digits.

Solution: The value of e is: e D 2.718281828
(a) (b) (c) To ?ve signi?cant ?gures e D 2.7183 e2 to ?ve signi?cant ?gures is e2 D 7.3891 Using the value from part (a) we ?nd e2 D 7.3892 which is not correct in the ?fth digit.

[Part (c) demonstrates the hazard of using rounded-off values in calculations.]

Problem 1.3 A machinist drills a circular hole in a panel with a nominal radius r D 5 mm. The actual radius of the hole is in the range r D 5 ? 0.01 mm. (a)
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