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= 1,5kg × 10m/s² × 20m
= 300 joule
thanks
=1500 g.10 m/s².20 m
=1,5 kg.10.20
=300 j
5)Ek A:Ek B
1/2 m.v²:1/2mv²
1/2m.2²:1/2m.4²
4:16
1:4