You are driving along a highway at 80.0 km/hr in car that is 6.0 m long. Exactly 10 m ahead of you is a truck of length 12.0 m driving at 60.0 km/hr.
a. If you wish to pass the truck so that the back of your car just clears the front of the truck in 3.0 s, how fast must you accelerate?
b. What will your speed be when you pass the front end of the truck?
I thought I could use Xf-Xi = Vixt + 1/2a(t)^2, but it didn't give me the correct answer.
The Attempt at a Solution
Plugged in Xf=28km Vix=80km/h and t=3, but I couldn't get the correct answer. I didn't attempt B because I couldn't find A >.<