The car accelerates at a rate of 0.5 m/s2. How long travels 400 meters, and what will be its speed?

Correct answer:

t =  40 s
v =  20 m/s

Step-by-step explanation:

a=0.5 m/s2 s=400 m  s=21at2 t=2 s/a=2 400/0.5=40 s
v=a t=0.5 40=20 m/s

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