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Ek₂ = 460 J
S = 40 m
ΔEk = ?
ΔEk = Ek₂ - Ek₁
ΔEk = 460 - 120 = 340 J
W = ?
W = ΔEk
W = 340 J
W = F * S
340 = F * 40
F = 340 / 40 = 8,5 N
Nomor 2
Nomor 3