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= (20-15)/20
= 5/20
= 0,25 m/s²
3. GLBB = v berubah akibat percepatan konstan...opsi D
4. jarak = √((9+3)² + 9²)
= √144+81
= √ 225
= 15 m...........opsi D
5. opsi C.. karena kereta pergi meninggalkan stasiun
6. a = Δv/t
= (20-15)/10
= 5/10
= 0,5 m/s².......opsi A
7. 36 km = 36000 m
t = s/v
= 36000/10
= 3600 s
= 60 menit.........opsi B
8. t = Δv/a
= (30-10)/2
= 20/2
= 10 s...........opsi A