Question

which of the following is the best explanation of the transformation of energy from x to y?
at x the kinetic energy of the coaster car is at the highest and as it goes to y the kinetic energy is transforming into potential energy. energy is not lost, but only transformed as the coaster car moves through the roller coaster.
at x the coaster car is creating more energy because it is moving faster. as the coaster car moves to y some of that energy is destroyed as it slows down.
the coaster car has a lot of kinetic energy at x because it is going really fast. at the y point, the coaster car loses energy because it is slowing down.
the coaster car has 100% potential energy at the x and as it goes to y the coaster car increases the kinetic energy because it is going fast. energy is not lost, but only transformed as the coaster car moves through the roller coaster.

Explanation:

Energy is conserved and transformed. At X (higher position), coaster has potential energy. As it moves to Y (lower position), potential energy converts to kinetic energy (since it speeds up). Energy isn't lost but transformed.

Answer:

At X the kinetic energy of the coaster car is at the highest and as it goes to Y the kinetic energy is transforming into potential energy. Energy is not lost, but only transformed as the coaster car moves through the roller coaster.