Train 2

The train slowed down from 90 km/h to 72 km/h in 5 seconds. What distance did it go?

Correct answer:

s =  112.5 m

Step-by-step explanation:

t=5 s v1=90 km/h m/s=90:3.6  m/s=25 m/s v2=72 km/h m/s=72:3.6  m/s=20 m/s  a=(v1v2)/t=(2520)/5=1 m/s2  s=v1 t21 a t2=25 521 1 52=2225 m=112.5 m

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