Jawabanmu

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2014-04-15T19:45:45+07:00
Hitung kecepatan disetiap sumbu lalu cari resultan 
Vx = GLB = Vo.cos37 = 50.0,8 = 40 m/s
Vy = GLBB = Vo.sin37 - gt = 50.0,6 - 10.1 = 30-10 = 20 m/s 
Vr = 20(5)^1/2 m/s 
# (X)^1/2 = akar x 
Ek = 1/2 mv^2 = 1/2.0,02.(20(5)^1/2)^2 = 2000.0,01 = 20 J
gimana cara nyari v resultan? bukan √(40^2+20^2) ?
Komentar sudah dihapus
lantas knp 20(5)^1/2 m/s?
oh iya maaf
1600 + 400 = 2000 = 40.50 = 20/50 = 20/25.2 = 100/2
maka Ek nya = ½.0,02.100.100.2 = 200 J
0.01 * 2000 bener 20 kok, gk usah diralat, 2000^1/2 kalo dikuadrat sama aja 2000