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s = 0,4 cm = 0,004 m
dit:0,8 cm =..J w=..????
W = F.s
=50x0,004= 0,2 J
brp 0,8 cm = ...J
=50 x 0,008 = 0,4 Joule
W = m.a.s
W = Usaha (Joule)
F = Gaya (N)
s = Perpindahan (m)
m = Masa (kg)
a = Percepatan (m/s2)
bner gk..??
F1 : F2 = Δx1 : Δx2
50 : F2 = 0,4 : 0,8
50 : F2 = 1 : 2
F2 = 2 . 50
F2 = 100 N