- #1
freshcoast
- 185
- 1
Homework Statement
You and your identical twin are driving identical cars with identical tires down a straight road on a foggy day. You are the more prudent of the two and are driving at a speed of 50 km/hr. Your twin decides to pass you and accelerates to a speed of 70 km/hr, which he maintains as he tries to pass. As his car draws level to yours, each of you sees an overturned truck blocking the road. You each apply the brakes at the same instant and begin to skid towards the truck. You manage to halt a few inches from the truck. Approximately how fast is your twin going when he crashes into it?
Homework Equations
Vf = Vo + at
Δx = Vot + 1/2at^2
Vf^2 = Vo^2 + 2aΔx
The Attempt at a Solution
for car 1 Vo = 50km/hr
for car 2 Vo = 70km/hr
So far all I can do is convert the velocities to meters per second, understand that for car 1 the final velocity would be 0. Both cars begin to brake at the exact same X initial which is not provided nor is a time or an acceleration rate. I don't if this problem is unsolvable due to not enough information but I can't seem to get any way to begin solving this problem, thanks in advance for any input