The spring shown in $($Figure $1)$ is compressed $47$ cmcm and used to launch a $100$ kgkg physics student. The track is frictionless until it starts up the incline. The student's coefficient of kinetic friction on the $3030$ incline is $0\mathrm{.}17.$

For help with math skills, you may want to review: Mathematical Expressions Involving Squares $$

For general problem$-$solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Car rolling down a hill.