1. The problem statement, all variables and given/known data A small block is shot into each of the four tracks as shown below. Each of the tracks rise to the same height. The speed with which the block enters the track is the same in all cases. At the highest point of the track, the normal Reaction is maximum in which track? 2. Relevant equations At the highest point, N - mg = (mv^2)/r So, N = (mv^2)/r + mg 3. The attempt at a solution I don't understand how the curvature of the track affects the normal reaction. I suppose it can't be option 3 and option 4 because those have greater radius and using the above mentioned formula, the normal reaction will be less. But why is the answer 1 when option 1 and 2 seem to have the same radius?