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sudut=30°
s=50m
W=F×s
= Fcos30°×50
= 1/2√3×50
=25√3 (horizontal=cos)
F = 60 N
α = 30⁰
s = 50 m
W = ?
W = F.cos 30⁰. s
W = 60. 1/2.√3. 50
W = 1500√3 J
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