Lực hướng tâm và gia tốc hướng tâm

Home Lớp 10 Vật lý 10 - Sách kết nối tri thức Bài 32. Lực hướng tâm và gia tốc hướng tâmBài tập cơ bản

{"common":{"save":0,"post_id":"8854","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8314","mon_id":"1158790","chapter_id":"1159899","post_id":"8854","question":"Ch\u1ecdn \u0111áp án \u0111úng<\/strong> khi nói v\u1ec1 vect\u01a1 gia t\u1ed1c c\u1ee7a v\u1eadt chuy\u1ec3n \u0111\u1ed9ng tròn \u0111\u1ec1u.<\/p>","options":["A.<\/strong> Có \u0111\u1ed9 l\u1edbn b\u1eb1ng 0.","B.<\/strong> Gi\u1ed1ng nhau t\u1ea1i m\u1ecdi \u0111i\u1ec3m trên qu\u1ef9 \u0111\u1ea1o.","C.<\/strong> Luôn cùng h\u01b0\u1edbng v\u1edbi vect\u01a1 v\u1eadn t\u1ed1c.","D.<\/strong> Luôn vuông góc v\u1edbi vect\u01a1 v\u1eadn t\u1ed1c."],"correct":"4","level":"1","hint":"","answer":"Ch\u1ecdn D.<\/strong> Luôn vuông góc v\u1edbi vect\u01a1 v\u1eadn t\u1ed1c.<\/span><\/p>- V\u1eadn t\u1ed1c có ph\u01b0\u01a1ng ti\u1ebfp tuy\u1ebfn v\u1edbi qu\u1ef9 \u0111\u1ea1o.<\/p>- Vect\u01a1 gia t\u1ed1c có ph\u01b0\u01a1ng trùng v\u1edbi ph\u01b0\u01a1ng bán kính h\u01b0\u1edbng vào tâm qu\u1ef9 \u0111\u1ea1o.<\/p>- Do \u0111ó vect\u01a1 gia t\u1ed1c c\u1ee7a v\u1eadt chuy\u1ec3n \u0111\u1ed9ng tròn \u0111\u1ec1u luôn vuông góc v\u1edbi vect\u01a1 v\u1eadn t\u1ed1c.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-04-13 14:34:59","option_type":"txt","len":3},{"id":"8316","mon_id":"1158790","chapter_id":"1159899","post_id":"8854","question":"Câu nào sau \u0111ây nói v\u1ec1 gia t\u1ed1c trong chuy\u1ec3n \u0111\u1ed9ng tròn \u0111\u1ec1u là sai<\/strong>?<\/p>","options":["A.<\/strong> Vect\u01a1 gia t\u1ed1c luôn h\u01b0\u1edbng vào tâm qu\u1ef9 \u0111\u1ea1o.","B.<\/strong> \u0110\u1ed9 l\u1edbn c\u1ee7a gia t\u1ed1c $a=\\dfrac{v^2}{R}$<\/span>, v\u1edbi v là t\u1ed1c \u0111\u1ed9, R là bán kính qu\u1ef9 \u0111\u1ea1o.","C.<\/strong> Gia t\u1ed1c \u0111\u1eb7c tr\u01b0ng cho s\u1ef1 bi\u1ebfn thiên v\u1ec1 \u0111\u1ed9 l\u1edbn c\u1ee7a v\u1eadn t\u1ed1c.","D.<\/strong> Vect\u01a1 gia t\u1ed1c luôn vuông góc v\u1edbi vect\u01a1 v\u1eadn t\u1ed1c \u1edf m\u1ecdi th\u1eddi \u0111i\u1ec3m."],"correct":"3","level":"1","hint":"","answer":"Câu sai là C.<\/strong> Gia t\u1ed1c \u0111\u1eb7c tr\u01b0ng cho s\u1ef1 bi\u1ebfn thiên v\u1ec1 \u0111\u1ed9 l\u1edbn c\u1ee7a v\u1eadn t\u1ed1c.<\/span><\/p>- Gia t\u1ed1c h\u01b0\u1edbng tâm \u0111\u1eb7c tr\u01b0ng cho s\u1ef1 bi\u1ebfn thiên v\u1ec1 h\u01b0\u1edbng<\/strong> c\u1ee7a v\u1eadn t\u1ed1c trong chuy\u1ec3n \u0111\u1ed9ng tròn \u0111\u1ec1u.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-04-13 14:37:58","option_type":"math","len":0},{"id":"8317","mon_id":"1158790","chapter_id":"1159899","post_id":"8854","question":"Phát bi\u1ec3u nào sau \u0111ây là \u0111úng<\/strong>? Trong chuy\u1ec3n \u0111\u1ed9ng tròn \u0111\u1ec1u<\/strong><\/span><\/p>","options":["A.<\/strong> vect\u01a1 v\u1eadn t\u1ed1c luôn không \u0111\u1ed5i, do \u0111ó gia t\u1ed1c b\u1eb1ng 0.","B.<\/strong> gia t\u1ed1c h\u01b0\u1edbng vào tâm qu\u1ef9 \u0111\u1ea1o, \u0111\u1ed9 l\u1edbn t\u1ec9 l\u1ec7 ngh\u1ecbch v\u1edbi bình ph\u01b0\u01a1ng t\u1ed1c \u0111\u1ed9.","C.<\/strong> ph\u01b0\u01a1ng, chi\u1ec1u và \u0111\u1ed9 l\u1edbn c\u1ee7a v\u1eadn t\u1ed1c luôn thay \u0111\u1ed5i.","D.<\/strong> gia t\u1ed1c h\u01b0\u1edbng vào tâm qu\u1ef9 \u0111\u1ea1o, \u0111\u1ed9 l\u1edbn t\u1ec9 l\u1ec7 v\u1edbi bình ph\u01b0\u01a1ng t\u1ed1c \u0111\u1ed9 góc."],"correct":"4","level":"1","hint":"","answer":"Ch\u1ecdn D.<\/strong> gia t\u1ed1c h\u01b0\u1edbng vào tâm qu\u1ef9 \u0111\u1ea1o, \u0111\u1ed9 l\u1edbn t\u1ec9 l\u1ec7 v\u1edbi bình ph\u01b0\u01a1ng t\u1ed1c \u0111\u1ed9 góc.<\/span><\/p>A sai vì gia t\u1ed1c h\u01b0\u1edbng tâm khác 0.<\/p>B sai vì \u0111\u1ed9 l\u1edbn gia t\u1ed1c t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi bình ph\u01b0\u01a1ng t\u1ed1c \u0111\u1ed9.<\/p>C sai vì \u0111\u1ed9 l\u1edbn v\u1eadn t\u1ed1c không thay \u0111\u1ed5i.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-04-13 14:40:29","option_type":"txt","len":3}]}