Calculating Braking Force for a Moving Car

[Jyote25]

Homework Statement

A 1.20x10³ kg car is traveling at a speed of 22.5 m/s when the brakes are applied. If the car comes to a stop in 112m, what is the braking force?(Assume Uniform deceleration)

Homework Equations

Fnet=Fapp-FR

Fnet=ma

Fg=mg

The Attempt at a Solution

Thank you for your help!

 

[Lunar_Lander]

Consider the deceleration to be $$a=-\frac{((v_{2}-v_{1})^{2})}{2 \cdot s}$$.

Insert $$v_{2}=0~m/s$$, $$v_{1}=22.5~m/s$$, $$s=112~m$$.

 

[Jyote25]

Thanks for your help Lunar Lander, the formula definitely helps but what I'm having the most trouble with(I should have included this in the question) is knowing what is the Force Applied, Resistive force, etc...any ideas? Thanks again.