1 |
2 |
v | 2c |
. |
ab |
. |
bc |
. |
bc |
1 |
2 |
y-H2 |
x |
h | ′1 |
h1 |
sinθ |
| ||
sinθ |
h | ′1 |
1 |
2 |
1 |
2 |
h | ′1 |
1 |
2 |
1 |
2 |
h4 |
h1 |
1 |
64 |
A.雨滴沿飞出点的半径方向飞出,做平抛运动 | ||||
B.雨滴沿飞出点的切线方向飞出,做平抛运动 | ||||
C.雨滴落地后在地面形成一个和伞半径相同的圆 | ||||
D.雨滴落地后形成半径为r=R
|
A.s
| B.s
| ||||||||
C.
| D.s
|
A.小球的质量m=0.15kg | ||||
B.小球的质量m=0.125kg | ||||
C.小球的初速度v0=
| ||||
D.小球的初速度v0=4
|
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