問題詳情
20. A hydraulic lift raises a 2000-kg automobile when a 500-N force is applied to the smaller piston. If the smaller piston has an area of 10 cm2, what is the cross-sectional area of the larger piston? Note that the acceleration due to gravity g = 9.8 m/s2.
(A) 40 cm2
(B) 80 cm2
(C) 196 cm2
(D) 392 cm2
(E) 160 cm2
參考答案
答案：D
統計：A:0,B:1,C:0,D:0,E:0
難度：計算中