Tolong bantu jawab, terima kasih ka

<p>kaka bantu jawab nyak,&nbsp;</p><p>diket = • massa kereta (m) = 1500 kg</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;• ketinggian awal (h¹) = 30m</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;• ketinggian akhir (h²) = 10m</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;• percepatan gravitasi (g) = 10 m/s</p><p>~PENJELASAN~</p><p>a) PENURUNAN ENERGI POTENSIAL (Ep) GRAVITASI</p><p>(rumusny = m.g.h)</p><p>•∆Ep = m.g.(h¹-h²)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 1500kg. 10m/s. (30m-10m)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 300.000 joule</p><p>&nbsp;</p><p>b) ENERGI KINETIK (Ek) DAN KECEPATAN (v) DI TITIK Q</p><p>&nbsp; &nbsp; (i) Energi kinetik dititik Q</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Jika 20% Ep hilang, maka 80% diubah ke Ek</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Ek= 80% . ∆Ep</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Ek= 0,8 . 300.000 j</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Ek= 240.000j</p><p>&nbsp; &nbsp; &nbsp;(ii) Kecepatan dititik Q</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Ek = 0,5. m. v²</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; v² = ( 2. Ek)/m</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; v &nbsp; = √((2.240.000j)/1500kg)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; v &nbsp; = 20m/s</p><p>maaf y yg c kurang paham🙏🏻</p>