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# STATICS CE 2450

LSU

GPA 3.53

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This 6 page Class Notes was uploaded by Marianne Marvin III on Tuesday October 13, 2015. The Class Notes belongs to CE 2450 at Louisiana State University taught by Staff in Fall. Since its upload, it has received 24 views. For similar materials see /class/222650/ce-2450-louisiana-state-university in Civil Engineering at Louisiana State University.

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Date Created: 10/13/15

1 solutions 4491s 12109 843 AM Page 1 mmgt m quotFriquot n n Tn TTvmv addl Ry vNT exist No pomon 1 1 Round off the following numbers to three significant figures 3 465735 m b 55573 5 o 4555 N and d Z768k IJ Mm h556s c 116 27751 All 1 2 Representeach of the following combinau39ons of unis in the ooneot SI form using an appropriam prefix a itMN b Nom o MNhsl and d kNms I uMN loquotl0 N N Au 0 1 min lo mm MNm A a g 3 le Au 4 Elo wn Au 1 3 Represent each of the following quanti es in the I rm using an appropriam prefix 3 0000431 kg b 353003 N and 0 000532 km 0W31kglmllf Final An 3531039 NssskN An 5 0053 km 00053201 III 512 In An 1 4 Represent each of the following oombinotions of unis in the ooneot SI form a Mgms b Nmni and c mNkg 4 gs 1039 0 Fif flgh6 l A b ll lNIN7 NImmI A wnu s A 1 Solutions 4491s 12109 843 AM Page 2 2010 Pearson Education IncUpper Saddle Pl 7 NT exist No 1 5 Represent each of the following combinations n S rm E a E E of co ect 1 fo using an appropriate prefix a kNps b MgmN and c MNkg 4 ms 10quot 1039 N kNIlsm l GNI1 Au um mm a Mumm NTGgl Anl cumkrill kWA W quot GNIkg Am 10quotA us Represent each of the following to three significant figures and express each answer in uni using an appropriate prefix a 45 320 kN b 568105 mm and c 0005 63 mg a A 310 W x411lu n 45 MN AM hi ssatlo mm nssao39loquotm yum Au in 000563 5 Jl0 553quot An 1 7 A rocket has a mass of 250103 slugs on earth Specify a in mass in SI units and b is weight in SI unim 1f the rocket is on the moon where the acceleration due to gravity is gm 30 ft 52 determine to three significant figures c is weight in SI units and d its mass in SI unim FPO 1 lfa car is traveling atss mih determine in speed in kilometers per hour and meters per second FPO 1 Solutions 4491s 12109 843 AM Page 3 mmgt a quotWu ti n Tn TTvmv midi Ri vNT exist No portion 1 9 The mom Pa is actually a very small unit of pressure To show this convert 1Pa 1Nm2 to lbftz Atmospheric pressure at sea level is 147 lbinZ How many 39 7 pascals is this FPO 1 10 what is the weight in newtons otan object that has a mass of a 10 kg b 05 g and c 450 Mg Express the result to three significant figures Use an appropriate prefix m w 9Imlsll0kl 98 Al Di w 98l ms39ols my km 490m A c w 981mls1t5 Mgo hum u I Hi All 1 11 Evaluate each of the following to three significant figures and express each answer in sl unis usin appropriate prefix a 354 mg45 km00356 kN b 0004 53 Mg201 ms and c 435 MN23Z mm Janna I Emmi in u 354mg4 hnl00356kN ommw N 04410 5m f 0A 7kgIIIIN An b 000453 MgKZDI ma 4s mquot m kgml 10quot r 03 k c 435 mm mm m in aNui Au 18750 N In 1 12 The specific weight wlvol of brass is 520 lbftz Determine is density massvol in SI unis Use an appropriate pre ix mmn39 w i u nu 1 Solutions 4491s 12109 843 AM Page 4 2010 Pearson Educatlon IncUpper Saddle Pl 7 NT exist No 1 13 Convert each of the following to three significant figures a 201b ft to N m b 4501bftZ to kNmz and c 15 fth to mms quotmm 12 quothave u when mmn 39uwns m 21lNm Au w ml z lf rliquotJlll ldu 1o1 mm Aquot u a J 37 Inn s Ans 1 14 The density massvolume of aluminum is 526slugft3 Determine its density in SI unis Use an appropriate prefix 511 mm rWRTJY u Mu 15 Water has a density of 194slugft3 what is the ensit expressed in SI units Express the answer to three significant figures quot J 3 Zn 39 n 999 gm mo Mgm An Two particles have a mass of 8 kg and 12 kg respectively If they are 800 mm apart determine the force of gravity acting between them Compare this result with the weight ofeach particle quotI quot391 FG WK 0 s r7110quot m lassl a 512 F 567300 W l0olo39 N lo0nN AI W 951 735 N A m lzlul MN An 4 1 Solutions 4491s 12109 843 AM Page 5 mmgt m quotFriquot ti n Tn TTvmv midi Ry vNT exist No portion 1 17 Determine the mass in kilograms of an object that weight of a 20 mN 150 kN and o 60 MN I Yes has a b Express the answer to three significant figu Aupr Eq 1 3 we luv W ZO10quotkgmls39 A 39 5 minis1 20 quotI W I mmmm A 1 mm 1 omLwmm A g 9 mix 1 13 Evaluate each of the following to three significant figures and e ress each answer in SI unis usin an appropriate prefix a 200 kN1 b 0005 mm739 and 400 m C a mum smnoo m N1 00400 N 0mMN Ann M 0005 rnm a 2500 inx zsm Anl An lcl mom a 006410 m Maw 1 19 Using the base unis of the SI system show that Eq 172 is a dimensionally homogeneous equation w io e F in newtons Determine to three significant figures the gravitational force acting between two spheres that are touching each other The mass ofeaoh sphere is 200 kg and the radius is 300 mm min 241 2 I r r 452 m In g k kgem FG r1 1 200200 6673l m 74ll0 N74luN Am 1 Solutions 4491s 12109 843 AM Page 6 2010 Pearson Educatlon IncUpper Saddle Pl 7 NT exlst No 1 20 Evaluate eaoln of the following to three slgnltloant figures and express eaoln answer in SI units using an a roprlate prefix a 0631 Mm860 kg2 and PP b 35 mm73948 kg 3 ouma m 5st m I 0631 Mal8603 lsw I e m 35 Iankg39 Am BSJlo mlk b 35 mm h JSI0 mj tu kg lzls mk An 1 1 Evaluate 204 mm000457 kg346 N to three slgnltloant figures and express the answer in SI unis us39 g 20410quotmu45110 kg 39 345 N an appropriate p e 20 mmxoloo 51 Inn346 N 259mm n IN 259lun kgN

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