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 500-kg elevator is pulled upwa3jg)- fdlq;tkrd with a constant force of -xafrw; k9ew1su- ;mt5500 N for a distance of 50.0 m. What is the net work done on tfrk; xa u-19-;wtwesm he elevator?
A. $2.75 \times 10^{5} \; J$
B. $-2.45 \times 10^{5} \; J$
C. $3.00 \times 10^{4} \; J$
D. $-5.20 \times 10^{5} \; J$
参考答案: C
本题详细解析:
暂无
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