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(Solution) Statics and Mechanics of Materials 2nd William F. Riley 2판 솔루션

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갱신일 : 2011-04-08


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재료 및 기계역학 2판, 윌리암 F. 라일리의 솔루션
STATICS AND MECHANICS OF MATERIALS, 2nd Edition

RILEY, STURGES AND MORRIS

Chapter 1
1-1 Calculate the mass m of a body that weighs 600 lb at the surface of the earth. SOLUTION

m
1-2

W g

600 18.63 slug .................................................... Ans. 32.2

Calculate the weight W of a body at the surface of the earth if it has a mass m of 675 kg. SOLUTION

W
1-3

mg

675 9.81

6.62 10 3 N 6.62 kN .................................. Ans.

If a man weighs 180 lb at sea level, determine the weight W of the man (a) At the top of Mt. McKinley (20,320 ft above sea level). (b) At the top of Mt. Everest (29,028 ft above sea level). SOLUTION

W
Therefore: where (a)

Gme m re2 Wh rh2 Gme m 2.092032 10 7 ft
2 2

W0 r02 r0 rh r0 h 2.090 10 7 Wh W0 r02 rh2

2.090 10 7 ft 2.0320 10 4

180 2.090 10 7 2.092032 10 7 2.9028 10 4

179.7 lb ...................................... Ans. 2.0929028 10 7 ft

(b)

rh

r0

h 2.090 10 7 Wh W0 r02 rh2

180

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