3w_p05งานและพลังงานมีเฉลย

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ตตตตตตต 3 weeks for PAT2 ( ตตตตตตต ) 1 http://www.pec9 .com ตตตตต 5 ตตต ตตตตตตตตตต ตตตตต 5 ตตตตตตตตตตตตต 5.1 ตตต ตตต เเเเเเเเเเเเเเเเเเเเเเเเเเเเเเ เเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเ เเเเเเเเเเเเเเเ เเเเเเเเเเ เเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเ เเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเ เเเเเ เเเเเเเเเเเเเเ W = F s เเเเเ F เเเเเเ ( เเเเเเ ) s เเเเเเเเเเเเเเเเเเเเเเเเเ ( เเเเ ) W เเเเเเ ( เเเเเเเเเเ , เเเ ) ตตตตตตตต : เเเเเเเเเเเเเเเเเเเเเเเเเเเเ เเเเเเเเเเเเ เเเเเเเเเเเเเ (F) เเเเเเเ เเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเ เเเเเเเเเเเเ เเเเเเเเเเเเเ (F) เเเเเเ 5.1.1 ตตตตตตตตตตตตตตตตตตตตตตตตตตต ตตตตตตตตตต เเเเเเเเเเเเเเเเเเเเเเเเเ W = F s เเเเ เเเเเเเเเเเเ เเเเเเเเเ (F) เเเเเเเเเเเเ (s) เเเเ เเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเเ (W) เเเ 98 F s

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3W_P05งานและพลังงานมีเฉลย

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3 weeks for PAT2 ( ) 1 http://www.pec9 .com5 5 5.1 u lu uIIl u u II u u I ul W=F su F u( ) s u u ( u )Wu ( u, ) : uIu uuuIu (F) uuIu uIuuuI u (F) u5.1.1nnhL1hnunuu1 uW = F s uI (F) u (s) I1uu (W) l98Fs3 weeks for PAT2 ( ) 1 http://www.pec9 .com5 (F) uu 0u (s)uI (W) uu uuI (F) uuu (s)1 Iu (s) uu (W)1(1 Pat2) um uu uu uu u IIuul0u u uu 5.0u u u u lu uuu l. S 2.4 3.24.099( !1Fcosn:!1hLs )FsFsW = F sFsW = 0 W = FcossF cosF sin3 weeks for PAT2 ( ) 1 http://www.pec9 .com52(1 1)1u uI l00uluulu u l0u I uluu u l1 u 3u 1 l.l0002.l300 3.3000 4.l30003(1 Pat2) FI40 u2 u u I u 0.5u IF 100F30o3 weeks for PAT2 ( ) 1 http://www.pec9 .com5l.l2.4 2.l7.33.24.S 4. 34.6 5.1.2nun uuuJ JuI uI u uuI0 0 uuu4.1 l00 u 500 ul.2u 1u uu l.250 2.300 3.360 4.4001013 weeks for PAT2 ( ) 1 http://www.pec9 .com55.1.3h%hn n!hn ( F ) hLhh:%u ( s )I ( F ) u ( s )u uuuu uF.su5(En42 .n.)Fu I l0u l.l00 2.l503.200 4.500 6(En41 ..) uuu I102F ()s (u)5l04020F ()s (u)5l0402002 46 S246 (N)(m)3 weeks for PAT2 ( ) 1 http://www.pec9 .com5 u5u 60uu uuu I II lu II l. lS 2.l03. 7 4. 37(En48 .n.) u2u u Il0u u u n uuuu 4u2 9uuu 1032 46 S3 weeks for PAT2 ( ) 1 http://www.pec9 .com5l.90 2.72 3.364.lS5.2 nunu uuuul uuuuu1uul uu nuhuu u I u uu _ l I u 2uul u1043 weeks for PAT2 ( ) 1 http://www.pec9 .com55.2.1nu%unu%u u I uuu I u uu u luuuII lEk = 21m v2u Ek u () muu (u) vuuuI ( u/ )8(En47 .n.) uu0.5uIu 30 u u uuu uu l2 u u l.l00 2.l50 3.300 4.3501053 weeks for PAT2 ( ) 1 http://www.pec9 .com55.2.2nunhnunh u u u uu _ lu Iuu nunhu 11u u l I u u u uI u u IlEp= m g hu Epu uu ( ) muu (u) g uuu u ( u/ 2 ) h uuu uu (u )1063 weeks for PAT2 ( ) 1 http://www.pec9 .com5u Iuuu I nunh u 1 u l lu u () %uJuuu luuu u u u u uu IlEp= 21k s2u Ep

u u ( ) suu(u)k uu( /u )k=sFu Fu ( )s uu F( u )107nunu%uEk= m v2 nunhnunhu1Ep= m g hnunhu Ep= k s23 weeks for PAT2 ( ) 1 http://www.pec9 .com59.u AI l0 u l u uuBI 5u l.5u I u IAB ll.4 : 3 2.3 : 4 3.l : 24.2 : l10. uuu l u uul00 /uu uuu l.2u u Iu uu l.l0 2.7 3.4 4.21083 weeks for PAT2 ( ) 1 http://www.pec9 .com511(En 32)1 ul 050 l0.20 uIu l 50 uI3u Il 1 Iu u ul.l.S 2.3.2 3.4.64.6.4 12(En47 .n.) u40uuuu l00 /uI Iuu2 u uu I u_ I u uI uuIIu 1093 weeks for PAT2 ( ) 1 http://www.pec9 .com5l.20u 2.40 u3.50u 4.60 u5.3hghhLnuhgh hLnu hu 11 uu lu Q u l uu uI u u 5.4hL:hhghhLnuuu u_Lul1u E1 + W = E2

u El , E2u u uu1103 weeks for PAT2 ( ) 1 http://www.pec9 .com5Wuuu13(En 31) 1 1 20u 1 1I 90oI1 1 u1 u l.l02.203. 364.7214(En45 .n.) u u I u2.5u u u30 uu uu uu I I u u u/ l. 3 2. 4 3. 5 4. 61113 weeks for PAT2 ( ) 1 http://www.pec9 .com515(En46 .n.) luu lu u uun u I u u vl u 2v I Iuuul. 2 2.2 3.2 2 4. 41123 weeks for PAT2 ( ) 1 http://www.pec9 .com516(En 41)u Aulu 1LuBu2u 1 2Lu u uuI uu I u A I IuBl.2l2.2l3.l 4.21133 weeks for PAT2 ( ) 1 http://www.pec9 .com517(1 30)uu u2u 4u1 u Iu u u Iuu2uu IIuu4ul. 2.2l 3.2 4.418(En 34)I u 1 0.S u ul P 1uu60ou u P u uu 2 u/ u u 1 Iu l I1 1140.6 u.60o0.S u.PQ3 weeks for PAT2 ( ) 1 http://www.pec9 .com50.6 u u l Q I u u Q u/ l.2.0u/ 2.2.Su/ 3.3.4u/ 4.S.0u/ 19(En43 .n.) u0.5 u 2.0uu uI 1 uI uuuu 200 u u ul. l0cm 2. 20 cm 3. 30cm4.40 cm1153 weeks for PAT2 ( ) 1 http://www.pec9 .com520(En 40)u2uuu2 uuu2 u uu ABu u ulB l u u u uu u uuu2 ul.2.Sm/s2.2.0m/s3.l.7m/s4.l.4m/s1164 mAB3 weeks for PAT2 ( ) 1 http://www.pec9 .com521(En 38) u 2u u u kuuum 2 I u _ uu L umI u L u u mu IumIuu uuul(luu u u I )l.v=Lm2k2.v=2 Lmk3.v=2lLm2k4.v=Lm 2k 117Lm3 weeks for PAT2 ( ) 1 http://www.pec9 .com522(En44 .n.) uml m2 u uml

u uul00/uIu l2uumlI lu 20 u I1um2 uuIuml Iu I 1u m2umlulul.0.Su/ 2.l.6u/ 3.2.2u/ 4.3.2u/ L 2.1nnuml =l kg ,k=l00N/m,W=0 , v=?118l2 cm20 cm l2 cmmluEl = k uE2 = k+ m v2mlmlm2l2.0 cm3 weeks for PAT2 ( ) 1 http://www.pec9 .com5umlI l20cm( 0.2u.) uu u El = 2lk 2lsumll2cm ( 0.l2 u.)uuuuu u u u E2 = 2lk 22s +2l m v2_L l El + W =E2 2l k2ls+0= 2l k 22s + 2l m v2

2l (l00)( 0.2) 2 =2l (l00)( 0.l2)2 + 2l (l)v2 ( 12uu )4= l.44+v2 v2 = 2.56 v = 1.6/1n uu 2u ul.6u/ 1193 weeks for PAT2 ( ) 1 http://www.pec9 .com523(En 36) u2u u uuuu l0u/ I I Iu I l l u I ll. 25 2. 50 3. 754. 90 24(En42 .n.) ul uu u ll0 u 120F ( N ) ( m )5030l00.5.5l.040203 weeks for PAT2 ( ) 1 http://www.pec9 .com5_ u I 50 u uuI l.SN/m2.l0N/m3.S00N/m 4.l000N/m25(En41 ..) u5 u u u u I ul.00u u u_ u20 u uuuuuI uuluuQ l.2500 /u 2.3000/u1213 weeks for PAT2 ( ) 1 http://www.pec9 .com53.3500 /u 4.4000/u26(En46 .n) u40 u u u u l00 u u Iu500 u I uu I Iu u ( u u )l. 20 u. 2. 35 u. 3. 50 u. 4. 75 u.1223 weeks for PAT2 ( ) 1 http://www.pec9 .com527(1 Pat2) u30uuuu I u200 /u u uul.0u u I ulu u( luuIIu )1233 weeks for PAT2 ( ) 1 http://www.pec9 .com528(En46 .n.)u2uu uu uu30uu u d 1u u ul 0.2 u u u u400 /ud u ( 1 g =l0u/ 2 ) l.60 2. 50 3. 25 4. l029(En 39)AB=BC=CD=DE lI u luuuu124ABCDE3 weeks for PAT2 ( ) 1 http://www.pec9 .com5n Au E u uIu Bl.3:l 2.3:2 3.4:l4.4:330(En41 .n) u20u 490u u u uu ( u u )l.4.9 2.5.l 3.7.0 4.9.S 1253 weeks for PAT2 ( ) 1 http://www.pec9 .com531(En45 .n.) um uuu h u uu g uu uu u IuI u(luu Iu )l. 2gh2. gh3. g2h4.gh21263 weeks for PAT2 ( ) 1 http://www.pec9 .com532(En 29)uu uI50uI lunI u O lu OABC u C u ul.2.0 x l052.2.5 x l053.3.0 x l054.5.0 x l05127uu (u)u (u)6004002000200400600500ACB3 weeks for PAT2 ( ) 1 http://www.pec9 .com533(En45 .n.) u u u2 / u 2 u ul 4ul. 0.l2 2. 0.lS 3.0.204. 0.241283 weeks for PAT2 ( ) 1 http://www.pec9 .com534(1 Pat2) 1 uvuw 1 vl4vl.3w 2.5w 3.7w4.l5w35(En 31)uul000u u uu36 u-1 u 5 u 1293 weeks for PAT2 ( ) 1 http://www.pec9 .com5l.0.5 x l03 2.0.65 x l04 3.0.5 x l05 4.0.65 x l06 36(En 32) 2u luu u Iuuuuuu 2.5u u I u uuu6uluuI uun l. l0 2. l2 3. l44. 2001302.5 m3 weeks for PAT2 ( ) 1 http://www.pec9 .com537(En 31) u0.5 uu uu uuun u 4uuuul0u/ u uu uu u uun uu l.202.40 3.l00 4.200 1313 weeks for PAT2 ( ) 1 http://www.pec9 .com538(En 25) u0.2u 20u u Iu S uIu l.Su/ 2.l0u/ 3.l2u/ 4.l4u/ 132

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23 weeks for PAT2 ( ) 1 http://www.pec9 .com539(En41 ..) u llu u 1u60uu u uI uI1ulI I SunIuu u0.Su 1 ul I 0 I1l. 5400 2. 6600 3. 7200 4. Sl00 40(En45 .n.) u0.0l uu uu300u/ lu2uluuu200u/ ulu1333 weeks for PAT2 ( ) 1 http://www.pec9 .com5l. 2.50 x l04 2.2.00 x l043. l.25 x l04 4.l.00 x l04

41(En47 .n.) uu5000uu u uuu 20u/ 50u1l.5000 2. l0000 3. 20000 4. 400001343 weeks for PAT2 ( ) 1 http://www.pec9 .com542(En 36) u uu2ulu uuu2u/ u llllu u

uu l. 0.4 2. 0.33. 0.2 4. 0.l 1353 weeks for PAT2 ( ) 1 http://www.pec9 .com543.u0.4 u u uu uuu l.5 u uS u u uu u 6 uu

uu uuuuu( = 3.l)l.0.l5 2.0.30 3.0.34 4.0.531363 weeks for PAT2 ( ) 1 http://www.pec9 .com544(En 39)u2uu uu uSI1 uu2u/ ll0uuuI /ul. 400 2. 4S0 3. 5604. 64045(En46 .n.) u40 u u l30uu lu137vmk 3 weeks for PAT2 ( ) 1 http://www.pec9 .com5u u u

0.3 5u I ll.50 2.l00 3.l504.300 5.5huhuuuu l 1383 weeks for PAT2 ( ) 1 http://www.pec9 .com5u l P =

tW(u W=F.s)l P = tF.s (u ts= v)l P =F.v u P u ( ) W u ( ) tu ( )F u( ) s u( u ) tu( ) v u ( u )46(En 37) . u Il50 ul0 u u luul 5u n2 u uu u u

uu 0.5 I . 1 1393 weeks for PAT2 ( ) 1 http://www.pec9 .com5l. l25 2. 375 3. 4524. 7S547(En47 .n.) um u I h1 T 0 1 l. Tmgh2.2Tmgh3.( )T2h2T2hg m+4. ( )Th2T2hg m+48(En 36)IF u uuuuu u S140F(N)S (m )20l002 63043 weeks for PAT2 ( ) 1 http://www.pec9 .com5 1u u20 I F 0 IF l. 3.5W 2.9.0W3. 70W 4.90W49(En 39)uuu (F)u(S) u lu 15 uul.455 2.459 3.54l0.S 4.60 l2 141F (N)s (m)065 l03 weeks for PAT2 ( ) 1 http://www.pec9 .com550(En47 .n.) Xu x = 0l x = l0u n4 _I 0 I1 u l.20 2.30 3.40 4.50 51(En48 .n.) uS0u uuul0u/ u20 uuu Iu 20 0 1 20 14224 6x(m)202040F (N)0Sl03 weeks for PAT2 ( ) 1 http://www.pec9 .com5l. l00 2. 250 3. 4504. 75052(En43 .n.) u 1 uu uLl 7.2 /1 u u 90 u/1u uu l uu3.4 x l07 25% Iuuu uuIu Iu l. l7 2. 34 3. 54 4.601433 weeks for PAT2 ( ) 1 http://www.pec9 .com553(1 A-net) lulu u u 6u l.l x l0l0 2.2 x l0ll 3.3 x l03 4.9 x l05 1443 weeks for PAT2 ( ) 1 http://www.pec9 .com554(1 Pat2)ul00 u1 uul0u- 20u nl0 l.l.5 x l03 2.3.0 x l03

3.7.5 x l04 4.l.5 x l05

1453 weeks for PAT2 ( ) 1 http://www.pec9 .com555(En 35) u uu l000uul0u/ 20 u / u 5.0 0 u 1 l. l0.0 2. 20.03. 30.0 4.40.0 56(En45 .n.)ulu u uu4.0 u2.0u u u 0 u l.0u 2.0 1463 weeks for PAT2 ( ) 1 http://www.pec9 .com5l. 5.0 2. l0.0 3. 20.2 4. 40.0 57(En42 .n.) u u u nl1 uuu lu3600 uI u l0u0 l uu 30u Iu u uul.l00 2.l50 3.550 4.l,000 1473 weeks for PAT2 ( ) 1 http://www.pec9 .com558(En45 .n.) uI h uI uuuuuuR u u I uum uuuu l.mg 2.mg( )Rhl3.mg( )Rhl+4.mg( )R2hl+1483 weeks for PAT2 ( ) 1 http://www.pec9 .com559(En44 .n.)uml u uuu40.0u u uu u l00 u um uu uOuuuu 50.0uIu Iu I u I l.5 2. 43. 3 4. l149Omv 3 weeks for PAT2 ( ) 1 http://www.pec9 .com55.6 nhuu u u 1 I I u lu 1 lu u Q l uun l u = u Q l uun

n u (En)= uu 1 u lx l00 %60(En42 .n) 1u60uu luu20 u 400 1ll.60uluuQ 1u l ul. l0 2. 53. l 4. 0.S1503 weeks for PAT2 ( ) 1 http://www.pec9 .com561(En 35) u u750 uuIuS50uI ll 20uS 150 u Qll.40.0 2.S0.03.l2.0 4.l60.0 1513 weeks for PAT2 ( ) 1 http://www.pec9 .com562(En42 .n) u l Iu uul50uI l l30ul u l u l Ql uu l. l.0 x l04 2.l.2 x l043. l.5 x l04 4.4.5 x l0463.20 0u3u15237o20 .3 weeks for PAT2 ( ) 1 http://www.pec9 .com5I uu37o uunI l.90 % 2.67 %3.50 % 4.40 %64. u uuuIu l uu l u u 5 lu nIu 50%l. l000 2. l500.37 3. l570.S 4. l756.S1533 weeks for PAT2 ( ) 1 http://www.pec9 .com565(En44 .n.) u uuu 2uu uu Q l30%uI I l l.0.6m 2.l.2m 3.l.4m4.2.0 m154