Answer: 31.1 m/s²
Step-by-step explanation:
avg. accel. = (Vfinal - Vinitial) / Δt
Vfinal = 14 m/s
Vinitial = 0 m/s
Δt = 0.45 s
avg. accel. = (14 m/s - 0 m/s)/0.45 s = 31.1 m/s²
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