問題詳情
2. 一物體質量為2公斤，欲施一個垂直向上之力使該物體以加速度2m/s2向上加速，應施力若干牛頓？(重力加速度為10m/s2)
參考答案
答案：C
難度：適中0.681481
統計：A(11),B(7),C(92),D(2),E(0)
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