9. At which point (A, B, C) must a skier start in order to make a SHM in the valley whose cross section is shown below (assume that there is no friction)? If the valley is described by a function y(x)=5x²+3 near valley bed how long does it take for the skier who has 70kg mass in order to make one complete cycle? y(x) y(x)=5x²+3 A B

9. At which point (A, B, C) must a skier start in order to make a SHM in the valley whose cross section is shown below (assume that there is no friction)? If the valley is described by a function y(x)=5x²+3 near valley bed how long does it take for the skier who has 70kg mass in order to make one complete cycle? y(x) y(x)=5x²+3 A B