When and where will the collision occur in a one lane tunnel?

[steph35]

Finding a collision time...

Homework Statement

Sue, driving at 33 m/s enter a one lane tunnel. She then observes a slow moving van 175 m ahead traveling with velocity 5.40 m/s. Sue applies here brakes but can accelerate at only -2.00m/s^2.

Homework Equations

Determine how far into the tunnel and at what time the collision occurs.

The Attempt at a Solution

 

[Redbelly98]

Hello,

FYI, it's forum policy that you show the relevant equations and, more importantly, show your attempt at solving the problem, before you can get help with it.

See item #1 here:
https://www.physicsforums.com/showthread.php?t=94379