本题目来源于试卷: Work Energy and Power，类别为 美国物理杯赛(Physics Bowl)
[单选题]
05.05: A box of old textbooks is on the middle shelfvlysmy m--nj90 /n bt7 in the bookroom 1.3 m fb5h*r5sht z1)wwcy / .sjzi*+vdk u r1rom the floor. If the janitor relocates the box to the shelf that is 2.6 m from the floor, how much work does he do on the box. +.usrdwh5ckbrs j*z/it15yz1wv h * )The box has a mass of 10.0 kg.
A. 13.0 J
B. 26.0 J
C. 52.0 J
D. 130 J
E. 260 J
参考答案: D
本题详细解析:
暂无
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