1 |
2 |
d |
2 |
T |
2 |
F |
m |
qU0 |
md |
qU0 |
6mL0 |
L |
v |
12L0 |
v |
mv2 |
r |
Nm2v3 |
6q2U0L0 |
2qU0 |
mv2 |
T |
4 |
1 |
2 |
d |
2 |
T |
4 |
T |
2 |
T |
2 |
(2N+1) |
2 |
12L0 |
v |
(2N+1)2m2v3 |
6q2U0L0 |
2qU0 |
mv2 |
1 |
2 |
|
1 |
2 |
|
A.R越大,v0越大 |
B.R越大,小球经过B点后的瞬间对轨道的压力越大 |
C.m越大,v0越大 |
D.m与R同时增大,初动能Ek0增大 |
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