Question

Soal olimpiade ipa nomor 19
tolong bantuannya

Answer 1

0 < t < ta
• ∆t = ta - 0 = ta
• ∆x = xa - 2 xa = - xa
• v = ∆x / ∆t = - xa / ta

ta < t < 2 ta
• ∆t = 2 ta - ta = ta
• ∆x = xa - xa = 0
• v = ∆x / ∆t = 0 / ta = 0

2 ta < t < 3 ta
• ∆t = 3 ta - 2 ta = ta
• ∆x = 0 - xa = - xa
• v = ∆x / ∆t = - xa / ta

laju:
..ada - nol - ada
perpindahan:
..ke kiri - diam - ke kiri

jawaban [D]