October 2018 1 53 Report
Seekor burung terbang pd ketinggian 15m d atas permukaan tanah dg kecepatan 36 km/jam . jika massa burung sbsar 250g dan percepatan gravitasi pd tempat itu sbsar 10 m/s2(kodrat) , mka energi mkanik yg dimilki brung tsb adalah ... (jwb dg satuan joule)

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