tolong jawab no.2,3,4,5,6,7,8( salah satu aj gpp)

2).?
3). KM = 100/20 = 5
4). KM = 150/50 = 3
F = W× Lb/ Lk= 60kg×10 m/s^2 × 50cm / 150cm
= 600N × 50/150= 200N
5).katrol tetap= KM = 1
KM = W/F
1=150kg × 10m/^2/F
F=1500N
Katrol bergerak= KM = 2
2=1500N/F
F=750N
Katrol majemuk=?
6).KM=s/h
s= 4^2+3^2
=5
KM = 5/3
W = ?
7).KM = 3
KM = 6000N / F
F = 6000N / 3
F = 2000N
8).s=W×h/F
=40kg×10m/^2×2m/200N
=400N×2m/200N
=4m