L |
2 |
1 |
2 |
v | 2A |
1 |
2 |
v | 2C |
L |
2 |
L |
2 |
v | 2A |
1 |
2 |
v | 2C |
|
|
L |
2 |
1 |
2 |
v | 2C |
1 |
5 |
|
1 |
5 |
A.88J | B.24J | C.20J | D.4J |
A.mgH | B.mgh | C.mg(H+h) | D.mg(H-h) |
A.小球到达最右端时,弹簧的形变量为2qE/k |
B.小球做简谐运动的振幅为2qE/k |
C.运动过程中小球的机械能守恒 |
D.运动过程中小球的电势能和弹簧的弹性势能的总量不变 |
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