When the train has passed at the point C, the radii of curvature is 20 m and the apparent weight is 2 2 times bigger than the real weight. At the moment when the picture was taken, the train was at the point s, located 8 m higher than the hollow C. At s, the radii of curvature est 16m. Calculate the quotient between the apparent weight at the point S and the real weight. There is no friction and no air resistance.
Sum of force in y = (mv^2)/radii
Energy at s = energy s
The Attempt at a Solution
I know what to do :
I calculate the speed at the point C. I get 62,6 m/s
I put up equations which respect that Es=Ec to find my speed at S
I do the sum of forces at S and find n and divide it by mg.
Now, the only point which Im not sure is what is the height the point S ? I is 48 m ?