SOLUTION: If a Cessna 172 requires 20 seconds to reach its liftoff speed of 120 km/h, what is its average acceleration?

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Question 1020135: If a Cessna 172 requires 20 seconds to reach its liftoff speed of 120 km/h, what is its average acceleration?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
a=%28v%5Bf%5D-v%5B0%5D%29%2Ft
We need to use consistent units so either convert seconds to hours or kph to kps.
20+s%2A%28%281+hr%29%2F%283600+s%29%29=%281%2F180%29hr
So then,
a=%28120-0%29%2F%281%2F180%29=21600km%2Fhr%5E2