Các dạng bài tập hay lạ khó chương DAO ĐỘNG CƠ HỌC có lời giải chi tiết
https://drive.google.com/file/d/1fPsGNLD9LAApCnZCJrxJz5nhf1p-KPfr/view?usp=sharing
https://drive.google.com/file/d/1fPsGNLD9LAApCnZCJrxJz5nhf1p-KPfr/view?usp=sharing
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
2<br />
mvOx<br />
Wcn<br />
mgh W mgl<br />
2<br />
1 cos<br />
0 max<br />
2<br />
2,86<br />
10. h 10.1,5 1 cos60 h 0,34 m Ch n C.<br />
2<br />
Câu 8.<br />
c b t t cao c i v<br />
th t t cao c i ch <strong>có</strong> th y th i sau<br />
Câu 9.<br />
t nh h H Ch n C.<br />
T qu c t: v0 2gl cos cos<br />
max<br />
3,22 m / s<br />
t v t chuy ng gi ng nh n t u:<br />
v v v<br />
0<br />
Ox<br />
Oy<br />
v v cos 45 2, 28 m / s<br />
Ox<br />
0<br />
v v sin 45 2,28 m / s<br />
Oy<br />
0<br />
T i v trí th t tiêu h 0<br />
u:<br />
2 2 2 2<br />
mv Ox<br />
mvy<br />
2,28 vy<br />
mgl 1 cos<br />
max<br />
10.2,5. 1 cos60<br />
2 2 2 2<br />
v<br />
y<br />
Câu 10.<br />
vy<br />
4,45<br />
4,45 m / s tan 62,9<br />
v 2,28<br />
R mg 3cos 2cos R mg 3 2cos<br />
max<br />
x<br />
cb<br />
max<br />
Ch n D.<br />
F R mg 2mg<br />
1 cos<br />
hl<br />
cb<br />
max<br />
2.0,1.10 1 cos 1,4 N 1,27 rad Ch n C.<br />
Câu 11.<br />
max<br />
max<br />
v<br />
R<br />
2gl<br />
cos cos<br />
mg 3cos 2cos<br />
max<br />
max<br />
R mg 3 2cos R mg 2mg 1 cos 1 N cos 0,5<br />
cb<br />
0 cb<br />
max max<br />
R mg 3cos 2cos mg cos<br />
min max max max<br />
4 2 2<br />
R 2Rmin<br />
cos cos<br />
max<br />
v 2.10.0,3 0,5 1 m / s Ch n B.<br />
3 3 3<br />
Câu 12.
Change language