Jawabanmu

2014-03-29T22:02:44+07:00
55 N-25N =30 N
usaha =F.s=30.8 =240 J
2014-03-29T22:06:52+07:00
Diketahui : Gaya dorong = 55 newton Gaya gesek = 25 newton Resultan gaya = 55 newton - 25 newton = 30 newton Perpindahan = 8 m W .... ? W = resultan gaya x s = 30 x 8 = 240 joule ( b )