一小球从静止开始自由下落,取 ,不计空气阻力,则下落 时下落的高度为:
Answer and explanation
Correct answer: C.
其他选项为什么不对: 代入检验,、、都与算出的 不符。
- Step 1: 自由落体 。
- Step 2: 。
Answer
.
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Correct answer: C.
Free questions with an explanation for every one, and full timed Gaokao mock tests.