KIỂM TRA 45 PHÚT MÔN VẬT LÝ 12 CƠ BA ̉ N ĐÊ ̀ _2_____ Họ va ̀ tên _ Lơ ́ p: __ 1.           !" #!"$%&' 2. ()*  + ,  - + ,   ,   .  +/ +  - ,   .  +/ +  0 .  ,   .  +/ + #1   .  +   &   +   2 + &  - + +  3. 34 ,  + + 5  ,   +  .   6, .   (  %, +  78 π  1   %&  , +  98 π  :  %  ,# + %&  , 4. *; <=>?< @ A4/B?C4D4@  g l T π 2 =  l g T π 2 =  g l T π 2 1 = # l g T π 2 1 = 5.  ,  + +  + % + +&,E F GH&I9J π K H π LIL5E 9 G7&I9J π M N H π LIL0  6 .  + & A +   O,    % .  ,  , .   %6-+M9 π ,   ,  , .   %6-+MF P ,    %##,   E F &  % ,  E 9 ,    MH π 6. +*  + . ,   .  ,   +  P  %. ,     P  % .  ,   Q 6  P   ,  - +#P  % .  ,  + +  7. R&?STUV%W? XY&C5X6@X%XY&C5X6@Z%*,[/ XY&C@X%#XY&C@Z%*,[/ 8. \]^_R T6`Ba`R@ :_%46 :_/% :_ 4= #:_A%/6 9. $a^&^b5&>5-S 5&>5 5&>56 #5&>5 10. !6T6T @GJ5c:d?E$E,T@T4E, TY&C ( ) Hzf r 9 = :? TeC6UT4E,&?&$B'OFH8&fF578&f F59 8&f#Fc8& 11. g4/e@Y=E5=Eh4FJI1'AGFJ8& 9 L*U e@ c59N&c95N&J5c9N&#H5F7& 12. >=E ,<@TY&C9Pi5?*CSWa@FJJ5'Aj 9 GFJ"=E   Fc:8  FcJJJ:8 FcJJ:8 #F:8 13. !>b=6*CS54/@&S A @l 5aB?C4D4GFJ8& 9 k &$@`W*; >* T6k@3G9&< @  @  F  F5l9 # 95l 14. P>?< @ F @ 9 *mHJ5S4/BX34X*W V`ZS&C YS@F9@N< @ F @ 9 "@ cJ@nJf97  @l7 fnJ@cJf#Ho5l@co5lf 15. !e <=T6GFJ@Y&C9PiDC@Vep6 04U e@  L7&IFJ ππ += tx IL       += 2 410 π π tcosx IL L9&IFJ ππ += tx IL# tsinx π 410 = IL 16. !e`Z <@T*U 3GH5F7&@6 GF3B Req4^6r5 eCe?6r6OJ5l8&F8&9 8&#H8& 17. !e <=/%4Bs @9JT*U3G9&DC@Ve q4^6r/<]B04U e@ EG9J&IjKLILEGFJ&IjK 9 π LILEG9&IjKLIL#EG&I9jKLIL 18. 04U >=E@EG7&9 π ILteA-=6GlJJI1'A π 9 GFJL J5JJFcu J5JFcuJ5FcFJ MH u #J5Fcu 19. !e`Zb <=X%/$%4U E F G7&I π K 9 π L@E 9 G7 H &I π L04U [S%@ E F GN&I π K c π LE F GN&I π M c π LE F GN&I π M c π L#E F GN&I π K c π L 20. !Y=ES4/@RCqv5Y*4/Wa F U*; @3 F GJ5c&gAW a 9 @U*; 6r3 9 GJ5N&3^*; *4/b F @ 9 @=E 3GJ59& 3GF&3GF57& #3GJ57N& 21. !ea>@=E?"*G7J:8`ZS97 4F9&*;@*CSe + I1'A 9 FJ π = L J5l&  + J59l*9& + J59l*9& + 7*#J5l& + 7* 22. \WY*CS F >@=EU T*;3 F GJ5c&3AWY@A6rWY*$?*CS 9 UZ  T*;3 9 GJ5N&*; ZbWYX>@=E +  A. F57&F& F5FN&#JlH& 23. 1=E?"*GF:81YS4/e?*CS'%HYU*6r=E?$< @995l@9o5l *; ` >=E*WeX4/@=E + 1'AGFJ8& 9  A. l&c59N&Jc9N &#Jl& 24. !,  - + E ,  + +   *A + 3Gl&64-+   +  . Gl&    ,  E J G 9 9  +   , J G 9 l π 8&%42 +  . -      EG&I 9 l π M 7 π LIL EG9&I 9 l π M 7 π LILEG&I 9 l π M 9 π LIL #EG&I 9 l π K 7 π LIL 25. !&$&?4ab'A*W$_D&?d%6r9@?cD&?4Ta4DN& teC4A<&?4aT@H598&  F5 9l8&95l8& #H8& 26. !&?4A<4a6R?6T&? λ GwHmgW$_RY'4X%4A<&? Z%nJ J @  J5ol  F5lH #9 27. 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