Les Ondes Mecaniques

  • June 2020
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  • Words: 452
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‫ا ت ا   اا‬ ‫‪ I‬ا ت ا   ‪.‬‬ ‫‪(1‬‬ ‫ ‪ $‬ا  ا   ‪ #‬هة ا  ر   و  دي ن )  ء ‪ ، *+, ،‬هاء ‪ (... &' ،‬دون ا ‪ 0‬ل ‪ .‬دة‬ ‫ا  ن ه‪1‬ا ا ‪ .‬و ن ‪ 2$‬إذا آ ن ا‪ 3 4‬ا ‪6‬د ‪ 5.6‬ا‪ 3 4‬ا  ره و‪ :‬إذا آ ن ا‪3 4‬‬ ‫ا ‪ ;< 5.6‬ا‪  0‬ا‪ 3 4‬ا  ره ‪.‬‬

‫‪ (2‬أ=‪ &+ .‬ا ت ا   ا‪:2$‬‬ ‫أ( ا  ر   ‪: 2$‬ل ‪: *+,‬‬ ‫ ‪ A+, +‬ا ‪CE FG‬ث  أ‪6 B : C,‬د ‪ @,A ، .6‬ا  ر   ‪:‬ل ا‪.*+E‬‬ ‫)'‪ J+K LE‬ا  ه ‪ I0‬ا ‪( BHAI‬‬

‫‪ (3‬أ=‪ &+ .‬ا ت ا   ا‪: I‬‬ ‫أ( ا= ل ا‪M‬ول‪:‬‬ ‫‪٢‬‬

‫‪ < &' ;+ CK6‬ت '& ‪N.,‬و  ‪E FG‬ره ‪ @, A ،‬ا  ر   ‪:‬ل ا‪ ;< B &' K‬ا‪ 3 4‬ا‪  O‬ر‪.‬‬ ‫‪ 5EK‬ا‪  O‬ر‬

‫ب(ا= ل ا= ‪:‬‬ ‫ا'‪$‬ت &‪ ! "#  $% !$‬ا  ه ت  ا ط و د و ا  ر   ‬ ‫(" ا*اغ‪.‬‬ ‫‪ 6 (4‬ا  ر   ‪:‬‬ ‫أ( ‪. : ,-.‬ف ‪ /‬ا ر &‪ )!$‬أ‪ -‬آ ن و ا  ر( ‪ (6. 7‬ا ‪:‬‬ ‫‪d‬‬ ‫‪∆t‬‬

‫=‪v‬‬

‫وو‪ "# 9‬ا< م ا‪9$: " .‬ات ‪m / s :‬‬

‫‪ : d‬ه" ا‪ # C‬ا" ‪ .AB‬ا‪6@ !$‬ل اة ا=& ‪. ∆t‬‬ ‫ب( ‪ /‬ا ر &‪$% !$‬ل ‪: $& EF9‬‬ ‫‪ /‬ا ر &‪$% !$‬ل ‪ A.  $& EF9‬ا‪ (6.‬ا ل‬ ‫‪T‬‬

‫‪µ‬‬

‫= ‪v‬‬

‫‪.‬‬

‫‪  $ : T‬ا‪ EFG‬ب ) ‪( N‬‬

‫&‪ / :2H$G:‬ا‪ B‬ء &‪  I# ، K!$‬اآ‪ F‬ن )أي  ف إ‪9‬اه إ‪ O‬ا‪@N‬ى( و‪ .7‬ا ‪ B‬ء ‪C-‬‬ ‫ا ر آ‪  & E‬دون ‪ K/ S  TU‬اآ‪ C- RG7 ،  F‬ا ر آ‪ V*7 !$& E‬ا<  و*‪ / V‬ا  ر‪.‬‬

‫‪  II‬ت ا ‪: $: KQB‬‬ ‫ا ت ا ‪  $: KQB‬ت ‪ BK  2$‬ا‪  O‬ر  أو ط ‪  T‬د آ <اغ '‪ 6$‬ا  ر ا‪R‬ء ‪.‬‬ ‫‪). c = 3.10 8 m / s‬آ  ‪ BK‬ا‪  O‬ر  ا‪M‬و ط ا د ‪ T‬أن ‪AW ' .X B6‬ف ا(وه  ن ‪O 4 Y‬ت‬ ‫آ‪ Z 'B‬و‪O 4‬ت ‪ $: KQ‬ددة و ‪C‬ة '‪ 5.6 BR‬ا‪ ، &+‬و ‪C‬ة ‪ 5.6‬ا‪ 3 4‬ا  ر ا  ‪.‬‬ ‫)ا \ [ * ا‪O 4‬ت ا ‪($: KQB‬‬

‫‪٣‬‬

: ‫ ا ت ا   اا‬III : (١ .‫! ت‬$‫ ا‬F ‫ و&' ن‬C& ‫اب‬AX‫ ا‬K/ S  ، AB- ،C& 7  "‫ا ه‬$‫! ا   ا‬$‫ا‬ : ‫( = ل‬٢ . ‫      ا‬5.6 *]E \K < ' ‫ر‬+K^ I‫ 'ا‬،‫ة‬IH ‫ة‬IH ، C‫_  ء راآ‬I 5.6 J'  ' 0$ CK6 :a+I(٣

SBIRO ABDELKRIM

mail : [email protected]

٤

msen : [email protected]

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