(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Car is driving up the hill with speed of 60 km/h. Angle of incline is 17°. Seeing barrier on the road, the driver suddenly stops (breaks the wheels) and starts to slide. If koef. of fiction is [tex]\mu[/tex]=0.6 what is the distance between breaking point and the point when cars stops. Solve the problem with the same parameters when the car is driving down the hill.

(I hope you understand the question, it is a little difficult for me to translate it...)

2. Relevant equations

Again, I solve it but I'm not sure if is correct..

3. The attempt at a solution

Uphill:

Ek = Ep + Fk*s

1/2 mv^2 = mgh + [tex]\mu[/tex]*m*g*cos([tex]\alpha[/tex])*s

(h = s * sin([tex]\alpha[/tex]))

...

s = 32,7 m

Downhill:

Ek + Ep = Fk*s

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Car driving up the hill

**Physics Forums | Science Articles, Homework Help, Discussion**