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 upward 5 t ha*tv5abgp 39( omidc6l.awith a constant force of 5500 N for a ds7ss/dahp,o +i csuroq*8 u( -istance of 50.0 m. What is the wor+s* 8uch,(- rsao/ q7pos siudk 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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