SOLUTION: a car is accelerating at a rate of 3.0 km hr. if its velocity is 40 km/ hr what is its velocity after 20 seconds

Algebra ->  Finance -> SOLUTION: a car is accelerating at a rate of 3.0 km hr. if its velocity is 40 km/ hr what is its velocity after 20 seconds      Log On


   

Question 1072317: a car is accelerating at a rate of 3.0 km hr. if its velocity is 40 km/ hr what is its velocity after 20 seconds
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
I'm assuming the acceleration units are km%2Fhr%5E2.
Convert 20 seconds to hours,
t=20%2F3600=2%2F360=1%2F180
So,
v%5BF%5D=v%5BI%5D%2Bat
v%5BF%5D=40%2B%283%29%281%2F180%29
v%5BF%5D=7200%2F180%2B3%2F180
v%5BF%5D=7203%2F180
v%5BF%5D=2401%2F60kph