Tolong bantu jawab plis 3 nomor doang

4][ Energi kinetik
m2 = 3 m1
v2 = 2 v1
Ek2 : Ek1= __?

Energi kinetik Ek = ½ m v²

Perbandingan
Ek2 : Ek1
= (½ m2 v2²) : (½ m1 v1²)
= (m2 v2²) : (m1 v1²)
= (3 m1 • (2 v1)²) : (m1 v1²)
= (12 m1 v1²) : (m1 v1²)
= 12 : 1 ← jwb


5][ HKE
Ema = Emb
Eka + Epa = Ekb + Epb
Eka + Epa = 0 + Epb
Eka = Epb - Epa
Eka = 2 Epa - Epa
Eka = Epa

Eka : Epa = 1 : 1 ← jwb


6][ Energi potensial
Ep1 : Ep2
= (ma g ha) : (mb g hb)
= (ma ha) : (mb hb)
= (2 • 5) : (3 • 4)
= 10 : 12
= 5 : 6 ← jwb