hw1_sol

# hw1_sol - ENGINEERING MECHANICS STATICS 2nd Ed W e F a...

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ENGINEERING MECHANICS - STATICS, 2nd. Ed. We Fa RILEY AND L, D, STURGES 11 Calculate the mass m of a body that weighs 600 lb at the surface of the earth. SOLUTION m= - - - - 600 - 18.65 slug g - 32.17 Ans. 1-2* Calculate the weight W of a body at the surface of the earth if it has a mass m of 675 kg, W = 675(9.807) = 6.62(lo3) N = 6.62 kN 1 -3 Calculate the gravitational constant g, in U.S. Customary units, for a location on the surface of the moon. - 8 2 1 Gmm 33*439(10 1 (5*037) (lo ) = 5.328 ftIsz 5.33 ftlsz --= 4, - 2 rrn (5.702(lo6)]' 1 -4 Calculate the gravitational constant g, in SI units, for a location on the surface of the sun. 30 Gms 6*673(10-")(1*990)(10 ) = 0e2741(103) m/s2 274 m/s --- - 2 gs- 2 Ans . rs [6.960(10~)]~ I 23 1-5* The planet Venus has a diameter of 7700 mi and a mass of 3.34(10 ) 1 slug. Determine the gravitational acceleration at the surface of the planet , ( Ans.

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. ENGINEERING MECHANICS - STATICS, 2nd. Ed. W. F. RILEY AND L. D. STURGES I 2 1-6* The gravitational acceleration 4s the surface of Mars is 3.73 m/s and the mass of Mars is 6.39(10 ) kg. Determine the radius of Mars. SOLUTION From Eq. (1-3): GmH -- gn - 2 23 - 6 6 t4 /60673t10-11)(6*39)(10 '= 3.381(10 1 ms3.38(10 ) m Anso r = 8, 3.73 1-7 Determine the gravitational force, in kips, exerted by the sun on the earth. Gmem~ - 3.439(10-' )(4.095)(10~~)(1.364)(10~~) F=-- 2 r [4.908(10~')]~ = 0.7974(102') lb = 7.97(10'~) kip Ans .
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hw1_sol - ENGINEERING MECHANICS STATICS 2nd Ed W e F a...

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