Calculating Braking Force for a Moving Car

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To calculate the braking force for a car with a mass of 1,200 kg traveling at 22.5 m/s that stops in 112 m, the deceleration can be determined using the formula a = -((v2 - v1)²) / (2 * s), where v2 is 0 m/s and v1 is 22.5 m/s. The user seeks clarification on how to identify the applied force and resistive force in the context of the problem. The net force can be expressed as Fnet = Fapp - FR, with Fnet also equal to ma. Understanding these forces is crucial for accurately calculating the braking force. The discussion highlights the importance of correctly applying physics equations to solve real-world problems.
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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!
 
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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.
 
Thanks for your help Lunar Lander, the formula definately helps :smile: 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.
 
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