Tolong Bantu aku ya gan

[tex]m = 20gr = 0.02kg \\ ab = 0.02 \times 2100 \times (0 - ( - 15) \\ ab = 0.02 \times 2100 \times 15 \\ ab = 630[/tex]
[tex]bc = 0.02 \times 336000 \\ bc = 6720[/tex]
[tex]bc = 0.02 \times 4200 \times (40 - 0) \\ bc = 0.02 \times 4200 \times 40 \\ bc = 3360[/tex]
Maaf kalo salah, semoga membantu