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

本题目来源于试卷: Physics Unit6: Work and Energy，类别为 通用国际物理

[单选题]
A 1.0-kg ball falls to the floor. When i )1ffl*j psu4p99f1 cb4yey aoav,9iit is 0; jdwm0x3gbyi;fx: jao/ sy;1.70 m above the floor, its potential energy exactly equals its kinetic energy. How fwm;:ds1 x;j oyjfi;g /0 bxay3ast 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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