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 500-kg elevator is pulled upward with a constzp9 5a1 gox0foant for/9o1 bf 0v5dbiuv9c k0:cetn rf,t7bece of 5500 N for a distance of 50.0 m. What is the net work done o:nvfte,0c7e c 9/ bku9fiv0brd b5o1tn the 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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