Tolong dijawab ya soalnya besok dikumpul gak harus semua kok yang penting nomor 1 dan 2 aja
1) Ep 1 = Ep 2
m g h = m g h ( gravitasi sama, hilangkan )
m h = mh
2 x 3 = m 2(3)
6 = 6 m
m = 1 kg
2) Mobil 1 = 200.000 J = 1/2 m
400.000 J = m
1000 kg = m
3) 36 km / jam = 10 m/s
Ek = 1/2 x 50 x 100
Ek = 2500 J
4) arah sama F = 25 + 25 = 50 N
W = F x S
W = 50 x 2
W = 100 Joule
5) F = -20 + 10 + 30 = 20
W = F x S
W = 20 x 3
W= 60 Joule