January 2019 1 15 Report
Seorang penerjun bermassa 60 kg berada di ketinggian 100 m dengan kelajuan turun 20 m/s. jika percepatan gravitasi diketahui 10 m/s², maka energi mekanik penerjun tersebut adalah...
a.20 kJ
b.54 kJ
c.72 kJ
d.85 kJ

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