The second classmate is right: as long as the first one is the highest, it doesn't matter what height the others are.
This is because of the conservation of energy. The cart starts a rest in the first summit, so it has only potential energy m*g*h, being h the height of the first summit. The cart cannot reach a higher summit with height h' > h, because it has not enough energy. The potential energy at height h' is higher than its potential energy.
But, as long as there is no friction, the cart can reach any summit lower than the first one, because it has enough available potential energy.
The second classmate should be right since the first one is the highest, it doesn't relevant what height the others are.
It is due to the conservation of energy. The cart begins a rest in the first summit, due to this it has only potential energy m*g*h here h be the height of the first summit. The cart cannot reach a higher summit with height h' > h, because it has not sufficient energy. The potential energy at height h' is higher than its potential energy. However, as long as there is no friction, the cart should reach any summit less than the first one, since it has sufficient available potential energy.
Learn more about the roller coaster here: https://brainly.com/question/21098267
