The car on the roller coaster is released from the position shown and allowed to roll freely.
name two of the forces that affect the motion of the car while it moves on the roller coaster.
describe how the potential and kinetic energy of the car change as the car rolls downhill.
explain why the car cannot reach point x on the third hill, as shown in the picture.

Gravitational potential energy,Kinetic energy.     when goes down potential goes into kinetic.    Cant reach x because not enough potential energy

Explanation:

where’s the list ? the question is incomplete

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.