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= 3/2
b) F.s = W. h
F. 3 = 900. 2
F = 1800/3
= 600 N
c) W = F.s
= 600. 3
= 1800 J
4 a) KM = 1
b) ya, karena katrol merupakan salah satu pesawat sederhana yang berguna untuk mempermudah pekerjaan
c) W = Ep = m.g.h --> m = р V
= 1000 . 8 /1000
= 8 kg
W = 8. 10. 10
= 800 J