Tolong jawab pakai cara
Jawaban:
5. (400+250) – 100 = 550N
= 550N/50kg = 11m/s ke kanan. (c)
6. Ep = m.g.h
= 0,5 x 9,8 x 10
= 49 J (a)
7. Ek = ½. m . v²
Mobil A = ½ x 1600 x 72 = 57600
Mobil B = ½ x 12800 x 36 = 230,400
Perbandingan : 57,600/230,400 = 1/4 (c)
8. Energi kalor, energi kimia, energi cahaya. (a)