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 3fb:6dm*1n i8 x wsbefwith a constant 5spmszhsj+)z-hf6) d force of 5500 N for a distance of s+hm ))z-pd zf6s5hjs 50.0 m. What is 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
| 
