This whole worksheet. i am not good at this and i am completely lost

1.) potential energy
2.)potential and kinetic
3.)The roller coaster car has the most kinetic energy at point X i know this because the car is moving and kinetic energy has the power to move or change things therefore point X is when the roller coaster car has the most energy.
4.)potential energy
5.)kinetic energy
6.) potential and kinetic energy

This is the answer of your question

Since the pully is a simple machine so the mechanical advantage is a 1