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No 2 jawaban 30m/s2
dik:
v = 72 km/jam = 20 m/s
t = 30 s
ditanya kecepatan atau percepatan???? agak rancu.
mungkin percepatan, maka:
Vt = vo + at
20 = 0 + a 30
20 = 30a
a = 20/30
a= 0,667 m/s²
2)
dik:
g = 10 m/s²
t = 3 s
v =..?
Vt = V0 + gt
Vt =0 +10 . 3
Vt = 30 m/s