Bantu jawab pleaseeeuuuuuuuuuuuuu:( no 3, 4, 5

3). A. KM = 20/120 = 1/6
B. KM = 80/60 = 4/3
yg sedikit energi yg B krn KM lbh besar.
4). KM = 4 dr jumlah tali/katrol
KM = w/F
4 = w/8
w = 32 N
5). KM = s/h
KM = 15/3 = 5