v2 |
R |
mv |
qB |
d |
2 |
d |
3 |
mv1 |
qB |
qBd |
3m |
qBd |
3m |
d |
2 |
mv2 |
qB |
qBd |
m |
qBd |
m |
qBd |
3m |
qBd |
m |
qBd |
3m |
qBd |
m |
A.小球向右摆到M点,然后就摆回来 |
B.小球向右摆到M和N之间圆弧上某点处,然后竖直下落 |
C.小球沿圆弧摆到N点,然后竖直下落 |
D.以上说法都不对 |
ABC |
A′B′C′ |
ABC |
A′B′C′ |
A.①② | B.①③ | C.②④ | D.③④ |
11 |
42 |
A.①② | B.①③ | C.②④ | D.③④ |
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