A weightlifter, is able to lift 250 kg 2.00 m in 2.00 s. What is his power output?
A、500 W;
B、2.45 kW;
C、4.90 kW;
D、9.80 kW;
E、19.80 kW
发布时间：2025-03-01 15:30:35
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答案：2.45 kW
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