問題詳情
38.tA force of 20 N acts on a wagon at an angle of 30° to the ground. Calculate the work done by the force Wien the wagon is dragged 100 m along the ground.
(A) 600 J
(B) 800 J
(C)100J
(D) 1300 J
(E) 1700 J
參考答案
答案：E
統計：A:0,B:0,C:0,D:0,E:1
難度：計算中