1. The problem statement, all variables and given/known data 2. Relevant equations F=m*a ΣF(n-direction)= m*a(n)= m*(v^2/ρ) ∑F(t-direction)= m*a(t)\ Ffriction= Fn*coefficient(of friction) 3. The attempt at a solution So I tried solving this question and apperently it is way easier than I thought. So I thought the kinetic friction has a component in the tangential direction of motion and one in the normall direction (pointing towards center or away from center). But apperently the kinetic friction in this question only points in tangential direction, but why? I tried rationalizing it, by saying friction only works in the direction of motion, but that is not true. Since a car that goes around a curved path, will notice that it's friction on it's tires will make him be able to take the corner/curve. Or is it that kinectic friction can only be in direction of motion and that the only friction that can work normall, towards center of curv, is the static component (unless u slipp away or towards center)?