問題詳情
33. A child uses a horizontal rope to pull a toy box weighing 100 N on a table. Given that the
coefficient of kinetic friction between the box and the table is 0.05, what is the work done by the
child to move the box 50 cm at a constant speed?
(A) 0.25 J
(B) 0.50 J
(C) 2.5 J
(D) 5.0 J
(E) 10 J
參考答案
答案：C
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中