Thực hành: Xác định động lượng của vật trước và sau va chạm-Bài tập dễ

Home Lớp 10 Vật lý 10 - Sách kết nối tri thức Bài 30. Thực hành: Xác định động lượng của vật trước và sau va chạmBài tập cơ bản

{"common":{"save":0,"post_id":"8838","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8265","mon_id":"1158790","chapter_id":"1159886","post_id":"8838","question":"Khi m\u1ed9t h\u1ec7 v\u1eadt \u0111\u01b0\u1ee3c coi là kín \u0111\u1ec3 xác \u0111\u1ecbnh v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt sau va ch\u1ea1m m\u1ec1m ta áp d\u1ee5ng \u0111\u1ecbnh lu\u1eadt nào sau \u0111ây?<\/p>","options":["A. <\/strong>\u0110\u1ecbnh lu\u1eadt b\u1ea3o toàn \u0111\u1ed9ng n\u0103ng.","B.<\/strong> \u0110\u1ecbnh lu\u1eadt b\u1ea3o toàn \u0111\u1ed9ng l\u01b0\u1ee3ng.","C.<\/strong> \u0110\u1ecbnh lu\u1eadt b\u1ea3o toàn c\u01a1 n\u0103ng.","D.<\/strong> \u0110\u1ecbnh lu\u1eadt b\u1ea3o toàn n\u0103ng l\u01b0\u1ee3ng."],"correct":"2","level":"1","hint":"","answer":"Ch\u1ecdn B.<\/strong> \u0110\u1ecbnh lu\u1eadt b\u1ea3o toàn \u0111\u1ed9ng l\u01b0\u1ee3ng.<\/span><\/p>Khi m\u1ed9t h\u1ec7 v\u1eadt \u0111\u01b0\u1ee3c coi là kín \u0111\u1ec3 xác \u0111\u1ecbnh v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt sau va ch\u1ea1m m\u1ec1m ta áp d\u1ee5ng \u0111\u1ecbnh lu\u1eadt b\u1ea3o toàn \u0111\u1ed9ng l\u01b0\u1ee3ng.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-04-10 09:22:27","option_type":"txt","len":2},{"id":"8267","mon_id":"1158790","chapter_id":"1159886","post_id":"8838","question":"T\u1ea1i sao có th\u1ec3 s\u1eed d\u1ee5ng b\u0103ng \u0111\u1ec7m khí \u0111\u1ec3 ti\u1ebfn hành ki\u1ec3m ch\u1ee9ng \u0111\u1ecbnh lu\u1eadt b\u1ea3o toàn \u0111\u1ed9ng l\u01b0\u1ee3ng?<\/p>","options":["A.<\/strong> Vì ma sát c\u1ee7a \u0111\u1ec7m khí l\u1edbn.","B. <\/strong>Vì ma sát c\u1ee7a \u0111\u1ec7m khí không \u0111áng k\u1ec3.","C.<\/strong> Vì s\u1eed d\u1ee5ng \u0111\u1ec7m khí \u0111\u1ec3 có ngo\u1ea1i l\u1ef1c tác d\u1ee5ng lên v\u1eadt.","D.<\/strong> T\u1ea5t c\u1ea3 \u0111\u1ec1u \u0111úng."],"correct":"2","level":"1","hint":"","answer":"Ch\u1ecdn B. <\/strong>Vì ma sát c\u1ee7a \u0111\u1ec7m khí không \u0111áng k\u1ec3.<\/span><\/span><\/strong><\/p>Có th\u1ec3 s\u1eed d\u1ee5ng b\u0103ng \u0111\u1ec7m khí \u0111\u1ec3 ti\u1ebfn hành ki\u1ec3m ch\u1ee9ng \u0111\u1ecbnh lu\u1eadt b\u1ea3o toàn \u0111\u1ed9ng l\u01b0\u1ee3ng vì ma sát c\u1ee7a \u0111\u1ec7m khí không \u0111áng k\u1ec3.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-04-10 09:23:57","option_type":"txt","len":3},{"id":"8268","mon_id":"1158790","chapter_id":"1159886","post_id":"8838","question":"Khi hai xe chuy\u1ec3n \u0111\u1ed9ng trên \u0111\u1ec7m khí n\u1eb1m ngang, h\u1ec7 hai xe chuy\u1ec3n \u0111\u1ed9ng có ph\u1ea3i h\u1ec7 kín không?<\/p>","options":["A.<\/strong> Có, vì ngo\u1ea1i l\u1ef1c tác d\u1ee5ng lên h\u1ec7 b\u1eb1ng 1.","B.<\/strong> Có, vì ngo\u1ea1i l\u1ef1c tác d\u1ee5ng lên h\u1ec7 b\u1eb1ng 0.","C.<\/strong> Không, vì ngo\u1ea1i l\u1ef1c tác d\u1ee5ng lên h\u1ec7 b\u1eb1ng 1.","D.<\/strong> Không, vì ngo\u1ea1i l\u1ef1c tác d\u1ee5ng lên h\u1ec7 b\u1eb1ng 1."],"correct":"2","level":"1","hint":"H\u1ec7 kín khi không ch\u1ecbu tác d\u1ee5ng c\u1ee7a ngo\u1ea1i l\u1ef1c nào ho\u1eb7c ch\u1ecbu tác d\u1ee5ng c\u1ee7a ngo\u1ea1i l\u1ef1c nh\u01b0ng h\u1ee3p l\u1ef1c b\u1eb1ng 0; ch\u1ec9 có n\u1ed9i l\u1ef1c (t\u01b0\u01a1ng tác gi\u1eefa hai v\u1eadt) ho\u1eb7c có n\u1ed9i l\u1ef1c l\u1edbn h\u01a1n r\u1ea5t nhi\u1ec1u so v\u1edbi ngo\u1ea1i l\u1ef1c.<\/p>","answer":"Ch\u1ecdn B.<\/strong> Có, vì ngo\u1ea1i l\u1ef1c tác d\u1ee5ng lên h\u1ec7 b\u1eb1ng 0.<\/span><\/p>Khi hai xe chuy\u1ec3n \u0111\u1ed9ng trên \u0111\u1ec7m khí n\u1eb1m ngang, h\u1ec7 hai xe chuy\u1ec3n \u0111\u1ed9ng có ph\u1ea3i h\u1ec7 kín vì ngo\u1ea1i l\u1ef1c tác d\u1ee5ng lên h\u1ec7 b\u1eb1ng 0.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-04-10 09:25:40","option_type":"txt","len":3}]}