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 swo h+ha1( nc;4ahx3 schjyfqez(:u1bi-z09 mt; z)y pulled upward with a constant force of 5500 N for a distance of 50.0 m. What is(qc 1z ze y:zbfu;y9jth- )mi0 the work done by the weight of 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: B
本题详细解析:
暂无
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