Dynamics Problem: Particle Kinetics - Normal & Tangential Components - Problem2

This problem is a basic Normal and Tangential problem.
The only new thing you might want to put on your radar is using the derivative of the path equation to figure out an angle.
We then use this angle to split the forces into components.
We also use the radius of curvature equation and the equation of the path to produce the radius of curvature (needed to compute the normal acceleration)

[@marcelofarfan5312]

For this problem, how come this time around the friction is negative when on Normal and tangential problem 1 video friction was positive when pointing the same way?