A car and driver weighing 5530 N passes a
sign stating "Bridge Out 25.5 m Ahead." She
slams on the brakes, and the car decelerates
at a constant rate of 13.7 m/s^2 :
The acceleration of gravity is 9.8 m/s^2 :
What is the magnitude of the work done
stopping the car if the car just stops in time
to avoid diving into the water? Answer in
units of J.
This is where I'm stuck. In class today we learned about Conservation of Energy and I don't know if that applies here.
I know there is constant acceleration in forward direction so I could use Kinematics but I don't know where to go from there I'm confused as to what sign to designate to 13.7 m/s^2.
So far I have: Vf^2=Vo^2+2a(deltaX)
The Attempt at a Solution