\u0110\u1ec1 thi th\u1eed THPTQG 2016 m\u00f4n L\u00fd – THPT Kho\u00e1i Ch\u00e2u l\u1ea7n 1 c\u00f3 \u0111\u00e1p \u00e1n gi\u00fap c\u00e1c em c\u1ee7ng c\u1ed1 ki\u1ebfn th\u1ee9c chu\u1ea9n b\u1ecb t\u1ed1t cho k\u00ec thi quan tr\u1ecdng s\u1eafp t\u1edbi:<\/strong><\/h2>\n\u0110\u1ec1 thi th\u1eed THPTQG 2016 m\u00f4n L\u00fd – THPT Kho\u00e1i Ch\u00e2u l\u1ea7n 1<\/strong><\/h4>\nC\u00e2u 25 : <\/strong>M\u1ed9t v\u1eadt dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a theo m\u1ed9t tr\u1ee5c c\u1ed1 \u0111\u1ecbnh (m\u1ed1c th\u1ebf n\u0103ng \u1edf v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng) th\u00ec<\/p>\n A. <\/strong>\u0111\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt c\u1ef1c \u0111\u1ea1i khi gia t\u1ed1c c\u1ee7a v\u1eadt c\u00f3 \u0111\u1ed9 l\u1edbn c\u1ef1c \u0111\u1ea1i.<\/p>\n B. <\/strong>th\u1ebf n\u0103ng c\u1ee7a v\u1eadt c\u1ef1c \u0111\u1ea1i khi v\u1eadt \u1edf v\u1ecb tr\u00ed bi\u00ean.<\/p>\n C. <\/strong>khi \u1edf v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng, th\u1ebf n\u0103ng c\u1ee7a v\u1eadt b\u1eb1ng c\u01a1 n\u0103ng.<\/p>\n D. <\/strong>khi v\u1eadt \u0111i t\u1eeb v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng ra bi\u00ean, v\u1eadn t\u1ed1c v\u00e0 gia t\u1ed1c c\u1ee7a v\u1eadt lu\u00f4n c\u00f9ng d\u1ea5u.<\/p>\nC\u00e2u 26 : <\/strong>M\u1ed9t con l\u1eafc l\u00f2 xo dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a. Bi\u1ebft l\u00f2 xo c\u00f3 \u0111\u1ed9 c\u1ee9ng 36 N\/m v\u00e0 v\u1eadt nh\u1ecf c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 100g. L\u1ea5y \u03c0<\/p>\n2<\/dd>\n = 10. \u0110\u1ed9ng n\u0103ng c\u1ee7a con l\u1eafc bi\u1ebfn thi\u00ean theo th\u1eddi gian v\u1edbi t\u1ea7n s\u1ed1.<\/p>\n
A. <\/strong>1Hz B. <\/strong>6 Hz C. <\/strong>12 Hz D. <\/strong>3 Hz<\/p>\nC\u00e2u 27 : <\/strong>M\u1ed9t v\u1eadt dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a tr\u00ean tr\u1ee5c Ox, xung quanh v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng O. Gia t\u1ed1c c\u1ee7a v\u1eadt ph\u1ee5 thu\u1ed9c v\u00e0o li \u0111\u1ed9 x theo ph\u01b0\u01a1ng tr\u00ecnh: a = -400\u03c0<\/p>\n2<\/dd>\nx (cm\/s<\/p>\n
2<\/dd>\n). S\u1ed1 dao \u0111\u1ed9ng to\u00e0n ph\u1ea7n v\u1eadt th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c trong m\u1ed7i gi\u00e2y l\u00e0:<\/p>\n
A. <\/strong>10 B. <\/strong>5 C. <\/strong>20 D. <\/strong>40<\/p>\nC\u00e2u 28 : <\/strong>M\u1ed9t con l\u1eafc l\u00f2 xo \u0111\u01b0\u1ee3c treo th\u1eb3ng \u0111\u1ee9ng t\u1ea1i n\u01a1i c\u00f3 gia t\u1ed1c tr\u1ecdng tr\u01b0\u1eddng g. Khi v\u1eadt nh\u1ecf \u1edf v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng, l\u00f2 xo d\u00e3n 4 cm. K\u00e9o v\u1eadt nh\u1ecf th\u1eb3ng \u0111\u1ee9ng xu\u1ed1ng d\u01b0\u1edbi \u0111\u1ebfn c\u00e1ch v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng 4 cm r\u1ed3i th\u1ea3 nh\u1eb9 (kh\u00f4ng v\u1eadn t\u1ed1c ban \u0111\u1ea7u) \u0111\u1ec3 con l\u1eafc dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a. L\u1ea5y \u03c0<\/p>\n2<\/dd>\n = 10. Trong m\u1ed9t chu k\u00ec, th\u1eddi gian l\u00f2 xo kh\u00f4ng d\u00e3n l\u00e0<\/p>\n
A. <\/strong>0,05 s B. <\/strong>0,13 s. C. <\/strong>0,10 s. D. <\/strong>0,20 s.<\/p>\nC\u00e2u 29 : <\/strong>Tr\u00ean m\u1eb7t m\u1ed9t ch\u1ea5t l\u1ecfng, t\u1ea1i O c\u00f3 m\u1ed9t ngu\u1ed3n s\u00f3ng c\u01a1 dao \u0111\u1ed9ng c\u00f3 t\u1ea7n s\u1ed1 f = 30Hz. V\u1eadn t\u1ed1c truy\u1ec1n s\u00f3ng l\u00e0 m\u1ed9t gi\u00e1 tr\u1ecb trong kho\u1ea3ng t\u1eeb 1,6m\/s \u0111\u1ebfn 2,9m\/s. Bi\u1ebft t\u1ea1i \u0111i\u1ec3m M tr\u00ean ph\u01b0\u01a1ng truy\u1ec1n s\u00f3ng c\u00e1ch O m\u1ed9t kho\u1ea3ng 10cm, s\u00f3ng t\u1ea1i \u0111\u00f3 lu\u00f4n dao \u0111\u1ed9ng ng\u01b0\u1ee3c pha v\u1edbi dao \u0111\u1ed9ng t\u1ea1i O. Gi\u00e1 tr\u1ecb c\u1ee7a v\u1eadn t\u1ed1c \u0111\u00f3 l\u00e0:<\/p>\n A. <\/strong>2,4m\/s B. <\/strong>3m\/s C. <\/strong>1,6m\/s. D. <\/strong>2m\/s.<\/p>\n![](\"http:\/\/img.toanhoc247.com\/picture\/2016\/0220\/de-thi-thu-thptqg-ly-2016-thpt-khoai-chau-lan-1.png\")
<\/p>\n
\u0110\u00e1p \u00e1n \u0111\u1ec1 thi th\u1eed THPTQG 2016 m\u00f4n L\u00fd – THPT Kho\u00e1i Ch\u00e2u l\u1ea7n 1<\/strong><\/h4>\n![](\"http:\/\/img.toanhoc247.com\/picture\/2016\/0220\/dap-an-de-thi-thu-thptq-ly-2016-thpt-khoai-chau-lan-1.png\")
<\/strong><\/p><\/p>\n","protected":false},"excerpt":{"rendered":"\u0110\u1ec1 thi th\u1eed THPTQG 2016 m\u00f4n L\u00fd – THPT Kho\u00e1i Ch\u00e2u l\u1ea7n 1 c\u00f3 \u0111\u00e1p \u00e1n gi\u00fap c\u00e1c em c\u1ee7ng c\u1ed1 ki\u1ebfn th\u1ee9c chu\u1ea9n b\u1ecb t\u1ed1t cho k\u00ec thi quan tr\u1ecdng s\u1eafp t\u1edbi: \u0110\u1ec1 thi th\u1eed THPTQG 2016 m\u00f4n L\u00fd – THPT Kho\u00e1i Ch\u00e2u l\u1ea7n 1 C\u00e2u 25 : M\u1ed9t v\u1eadt dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a theo […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[25],"tags":[],"yoast_head":"\n
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C\u00e2u 25 : <\/strong>M\u1ed9t v\u1eadt dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a theo m\u1ed9t tr\u1ee5c c\u1ed1 \u0111\u1ecbnh (m\u1ed1c th\u1ebf n\u0103ng \u1edf v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng) th\u00ec<\/p>\n A. <\/strong>\u0111\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt c\u1ef1c \u0111\u1ea1i khi gia t\u1ed1c c\u1ee7a v\u1eadt c\u00f3 \u0111\u1ed9 l\u1edbn c\u1ef1c \u0111\u1ea1i.<\/p>\n B. <\/strong>th\u1ebf n\u0103ng c\u1ee7a v\u1eadt c\u1ef1c \u0111\u1ea1i khi v\u1eadt \u1edf v\u1ecb tr\u00ed bi\u00ean.<\/p>\n C. <\/strong>khi \u1edf v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng, th\u1ebf n\u0103ng c\u1ee7a v\u1eadt b\u1eb1ng c\u01a1 n\u0103ng.<\/p>\n D. <\/strong>khi v\u1eadt \u0111i t\u1eeb v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng ra bi\u00ean, v\u1eadn t\u1ed1c v\u00e0 gia t\u1ed1c c\u1ee7a v\u1eadt lu\u00f4n c\u00f9ng d\u1ea5u.<\/p>\n C\u00e2u 26 : <\/strong>M\u1ed9t con l\u1eafc l\u00f2 xo dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a. Bi\u1ebft l\u00f2 xo c\u00f3 \u0111\u1ed9 c\u1ee9ng 36 N\/m v\u00e0 v\u1eadt nh\u1ecf c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 100g. L\u1ea5y \u03c0<\/p>\n = 10. \u0110\u1ed9ng n\u0103ng c\u1ee7a con l\u1eafc bi\u1ebfn thi\u00ean theo th\u1eddi gian v\u1edbi t\u1ea7n s\u1ed1.<\/p>\n A. <\/strong>1Hz B. <\/strong>6 Hz C. <\/strong>12 Hz D. <\/strong>3 Hz<\/p>\n C\u00e2u 27 : <\/strong>M\u1ed9t v\u1eadt dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a tr\u00ean tr\u1ee5c Ox, xung quanh v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng O. Gia t\u1ed1c c\u1ee7a v\u1eadt ph\u1ee5 thu\u1ed9c v\u00e0o li \u0111\u1ed9 x theo ph\u01b0\u01a1ng tr\u00ecnh: a = -400\u03c0<\/p>\n x (cm\/s<\/p>\n ). S\u1ed1 dao \u0111\u1ed9ng to\u00e0n ph\u1ea7n v\u1eadt th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c trong m\u1ed7i gi\u00e2y l\u00e0:<\/p>\n A. <\/strong>10 B. <\/strong>5 C. <\/strong>20 D. <\/strong>40<\/p>\n C\u00e2u 28 : <\/strong>M\u1ed9t con l\u1eafc l\u00f2 xo \u0111\u01b0\u1ee3c treo th\u1eb3ng \u0111\u1ee9ng t\u1ea1i n\u01a1i c\u00f3 gia t\u1ed1c tr\u1ecdng tr\u01b0\u1eddng g. Khi v\u1eadt nh\u1ecf \u1edf v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng, l\u00f2 xo d\u00e3n 4 cm. K\u00e9o v\u1eadt nh\u1ecf th\u1eb3ng \u0111\u1ee9ng xu\u1ed1ng d\u01b0\u1edbi \u0111\u1ebfn c\u00e1ch v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng 4 cm r\u1ed3i th\u1ea3 nh\u1eb9 (kh\u00f4ng v\u1eadn t\u1ed1c ban \u0111\u1ea7u) \u0111\u1ec3 con l\u1eafc dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a. L\u1ea5y \u03c0<\/p>\n = 10. Trong m\u1ed9t chu k\u00ec, th\u1eddi gian l\u00f2 xo kh\u00f4ng d\u00e3n l\u00e0<\/p>\n A. <\/strong>0,05 s B. <\/strong>0,13 s. C. <\/strong>0,10 s. D. <\/strong>0,20 s.<\/p>\n C\u00e2u 29 : <\/strong>Tr\u00ean m\u1eb7t m\u1ed9t ch\u1ea5t l\u1ecfng, t\u1ea1i O c\u00f3 m\u1ed9t ngu\u1ed3n s\u00f3ng c\u01a1 dao \u0111\u1ed9ng c\u00f3 t\u1ea7n s\u1ed1 f = 30Hz. V\u1eadn t\u1ed1c truy\u1ec1n s\u00f3ng l\u00e0 m\u1ed9t gi\u00e1 tr\u1ecb trong kho\u1ea3ng t\u1eeb 1,6m\/s \u0111\u1ebfn 2,9m\/s. Bi\u1ebft t\u1ea1i \u0111i\u1ec3m M tr\u00ean ph\u01b0\u01a1ng truy\u1ec1n s\u00f3ng c\u00e1ch O m\u1ed9t kho\u1ea3ng 10cm, s\u00f3ng t\u1ea1i \u0111\u00f3 lu\u00f4n dao \u0111\u1ed9ng ng\u01b0\u1ee3c pha v\u1edbi dao \u0111\u1ed9ng t\u1ea1i O. Gi\u00e1 tr\u1ecb c\u1ee7a v\u1eadn t\u1ed1c \u0111\u00f3 l\u00e0:<\/p>\n A. <\/strong>2,4m\/s B. <\/strong>3m\/s C. <\/strong>1,6m\/s. D. <\/strong>2m\/s.<\/p>\n \u0110\u1ec1 thi th\u1eed THPTQG 2016 m\u00f4n L\u00fd – THPT Kho\u00e1i Ch\u00e2u l\u1ea7n 1 c\u00f3 \u0111\u00e1p \u00e1n gi\u00fap c\u00e1c em c\u1ee7ng c\u1ed1 ki\u1ebfn th\u1ee9c chu\u1ea9n b\u1ecb t\u1ed1t cho k\u00ec thi quan tr\u1ecdng s\u1eafp t\u1edbi: \u0110\u1ec1 thi th\u1eed THPTQG 2016 m\u00f4n L\u00fd – THPT Kho\u00e1i Ch\u00e2u l\u1ea7n 1 C\u00e2u 25 : M\u1ed9t v\u1eadt dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a theo […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[25],"tags":[],"yoast_head":"\n<\/p>\n\u0110\u00e1p \u00e1n \u0111\u1ec1 thi th\u1eed THPTQG 2016 m\u00f4n L\u00fd – THPT Kho\u00e1i Ch\u00e2u l\u1ea7n 1<\/strong><\/h4>\n
<\/strong><\/p><\/p>\n","protected":false},"excerpt":{"rendered":"