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h = 2 m
s = 4 m
m = 5 kg
g = 10 m/s2
Ditanyakan : W ?
Dijawab :
F = h/s x W
= 2/4 x (5x10)
= 1/2 x 50
= 25 N
Usaha :
W = F x s
= 25 x 4
= 100 J
Nomor 7 :
D. 3 dan 4
KM = 2