Physics Unit6: Work and Energy (id: 5480ab857)

本题目来源于试卷: Physics Unit6: Work and Energy，类别为 国际高中通用物理

[单选题]
A 1.0-kg ball falls to to j 20m1c5fbt+9lbk jthe floor. ti9*siv9 w (.hbcyd ji43dg4gWhen it is 0.70 m above the floor, its potential energy exactly equals its kinetic e4i(t i. 4c9 diy*3vbsg9hgd wjnergy. How fast is it moving?

A. 3.7 m/s
B. 6.9 m/s
C. 14 m/s
D. 45 m/s


参考答案:  A


本题详细解析: 暂无

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