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rumus yang digunakan:
W=F.s
F=m.a
Vt=Vo+a.t
s=V0.t+1/2.a.t2
jawab:
Vt=Vo+a.t
6=0+a.20
6=a.20
a=6/20
a=0,3m/s2
s=Vo.t+1/2.a.t2
s=0+1/2.0,3.20^2
s=60m
W=F.s
W=m.a.s
W=500.0,3.60
W=9000 Joule
W=9kj